add rect_ to brand pic

mobile/control/brand.php

@@ -52,6 +52,6 @@ class brandControl extends mobileHomeControl
 
     private function _formatBrandPic($filename)
     {
-        return UPLOAD_SITE_URL . '/shop/brand/' . $filename;
+        return UPLOAD_SITE_URL . '/shop/brand/' . 'rect_'.$filename;
     }
 }