How do I set images back to square corners?

Somehow I have changed the image setting from square corners to rounded corners, and images upload with extra black space, because they're larger. I don't like it. I can't find the setting. How do I set images to square corners?

I'm using the latest version of OS Property. For example, visit:
svrcom.com/listings/featured-properties/2175-route-392.html

I want images like the related property on the right, not the left.

Hi,
Please follow these steps:
1. Open file
components > com_osproperty > classes > listing.html.php
2. find
if(($configClass == 1) and (count($row->relate_properties) > 0)){
ob_start();
$relates = $row->relate_properties;
?>
<?php if (isset($relates) && count($relates)){
$widthsize = round(100/count($relates));
?>
<div class="block_caption">
<strong><?php echo JText::_('OS_RELATE_PROPERTY')?></strong>
</div>
<div style="width:100%;text-align:center;">
<?php
for($i=0;$i<count($relates);$i++){
$rproperty = $relates[$i];
?>
<div style="width:<?php echo $widthsize?>%;text-align:center;float:left;">
<div style="float: left;padding: 5px;margin: 3px;vertical-align: top;border:1px solid #DDD;" class="img-rounded">
<div style="text-align:center;">
<a href="<?php echo JRoute::_("index.php?option=com_osproperty&task=property_details&id=".$rproperty->id."&Itemid=".JRequest::getInt('Itemid',0))?>" title="<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $rproperty->pro_name?>">
<img style="width: 120px;" alt="<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $row->pro_name?>" title="<?php echo $rproperty->pro_name?>" src="<?php echo $rproperty->photo?>" class="img-rounded" />
</a>
</div>
<div class="property_title" style="text-align:center;">
<a href="<?php echo JRoute::_("index.php?option=com_osproperty&task=property_details&id=".$rproperty->id."&Itemid=".JRequest::getInt('Itemid',0))?>" title="<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $rproperty->pro_name?>">
<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $rproperty->pro_name;?>
</a>
</div>
<div class="property_description" style="text-align:center;">
<div class="price">
<?php
//echo "<font class='price_label'>".JText::_('OS_PRICE').": </font>";
echo "<font class='property_type'>".$rproperty->type_name." </font>";
if($rproperty->price_call == 1){
//echo JText::_('OS_CALL_FOR_PRICE');
}else{
if($rproperty->price_original > 0){

echo "<span class='old_price'>".HelperOspropertyCommon::loadCurrency($rproperty->curr)." ".HelperOspropertyCommon::showPrice($rproperty->price_original)."</span>";
echo " - ";
}
if($rproperty->price > 0){
echo "<span class='market_price'>".HelperOspropertyCommon::loadCurrency($rproperty->curr)." ".HelperOspropertyCommon::showPrice($rproperty->price);
if($rproperty->rent_time != ""){
echo "/".JText::_($rproperty->rent_time)."</span>";
}
}
}
echo "</div>";
echo "<div style='clear:both;'></div>";
if($rproperty->show_address == 1){
echo "<div style='font-size:11px;max-width:180px;'>";
echo OSPHelper::generateAddress($rproperty);
echo "</div>";
}
echo "<div style='clear:both;'></div>";
echo "<div style='font-size:11px;text-align:center;width:100%;'>";
if($configClass == 1){
?>
<div style="display:inline;">
<img src="<?php echo JURI::root()?>components/com_osproperty/images/assets/bedroom.gif" border="0" class="icon_module" /> <?php echo $rproperty->bed_room?> &nbsp;
</div>
<?php
}
if($configClass == 1){
?>
<div style="display:inline;">
<img src="<?php echo JURI::root()?>components/com_osproperty/images/assets/bathroom.gif" border="0" class="icon_module" /> <?php echo $rproperty->bath_room?>
</div>
<?php
}
if($configClass == 1){
?>
<div style="display:inline;">
<img src="<?php echo JURI::root()?>components/com_osproperty/images/assets/room.gif" border="0" class="icon_module" /> <?php echo $rproperty->rooms?>
</div>
<?php
}
echo "</div>";
?>
</div>
</div>
</div>
<?php
}
}

and change to
if(($configClass == 1) and (count($row->relate_properties) > 0)){
ob_start();
$relates = $row->relate_properties;
?>
<?php if (isset($relates) && count($relates)){
$widthsize = round(100/count($relates));
?>
<div class="block_caption">
<strong><?php echo JText::_('OS_RELATE_PROPERTY')?></strong>
</div>
<div style="width:100%;text-align:center;">
<?php
for($i=0;$i<count($relates);$i++){
$rproperty = $relates[$i];
?>
<div style="width:<?php echo $widthsize?>%;text-align:center;float:left;">
<div style="float: left;padding: 5px;margin: 3px;vertical-align: top;border:1px solid #DDD;" class="img-rounded">
<div style="text-align:center;">
<a href="<?php echo JRoute::_("index.php?option=com_osproperty&task=property_details&id=".$rproperty->id."&Itemid=".JRequest::getInt('Itemid',0))?>" title="<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $rproperty->pro_name?>">
<img style="width: 120px;" alt="<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $row->pro_name?>" title="<?php echo $rproperty->pro_name?>" src="<?php echo $rproperty->photo?>" class="img-polaroid" />
</a>
</div>
<div class="property_title" style="text-align:center;">
<a href="<?php echo JRoute::_("index.php?option=com_osproperty&task=property_details&id=".$rproperty->id."&Itemid=".JRequest::getInt('Itemid',0))?>" title="<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $rproperty->pro_name?>">
<?php echo ($rproperty->ref != "")? $rproperty->ref.", ":""?><?php echo $rproperty->pro_name;?>
</a>
</div>
<div class="property_description" style="text-align:center;">
<div class="price">
<?php
//echo "<font class='price_label'>".JText::_('OS_PRICE').": </font>";
echo "<font class='property_type'>".$rproperty->type_name." </font>";
if($rproperty->price_call == 1){
//echo JText::_('OS_CALL_FOR_PRICE');
}else{
if($rproperty->price_original > 0){

echo "<span class='old_price'>".HelperOspropertyCommon::loadCurrency($rproperty->curr)." ".HelperOspropertyCommon::showPrice($rproperty->price_original)."</span>";
echo " - ";
}
if($rproperty->price > 0){
echo "<span class='market_price'>".HelperOspropertyCommon::loadCurrency($rproperty->curr)." ".HelperOspropertyCommon::showPrice($rproperty->price);
if($rproperty->rent_time != ""){
echo "/".JText::_($rproperty->rent_time)."</span>";
}
}
}
echo "</div>";
echo "<div style='clear:both;'></div>";
if($rproperty->show_address == 1){
echo "<div style='font-size:11px;max-width:180px;'>";
echo OSPHelper::generateAddress($rproperty);
echo "</div>";
}
echo "<div style='clear:both;'></div>";
echo "<div style='font-size:11px;text-align:center;width:100%;'>";
if($configClass == 1){
?>
<div style="display:inline;">
<img src="<?php echo JURI::root()?>components/com_osproperty/images/assets/bedroom.gif" border="0" class="icon_module" /> <?php echo $rproperty->bed_room?> &nbsp;
</div>
<?php
}
if($configClass == 1){
?>
<div style="display:inline;">
<img src="<?php echo JURI::root()?>components/com_osproperty/images/assets/bathroom.gif" border="0" class="icon_module" /> <?php echo $rproperty->bath_room?>
</div>
<?php
}
if($configClass == 1){
?>
<div style="display:inline;">
<img src="<?php echo JURI::root()?>components/com_osproperty/images/assets/room.gif" border="0" class="icon_module" /> <?php echo $rproperty->rooms?>
</div>
<?php
}
echo "</div>";
?>
</div>
</div>
</div>
<?php
}
}

It will replace the rounded conner by square conners in the related properties's pictures for you
Thanks
Dam