Fixed undefined array index label_use_default in Mage_Catalog_Model_Product_Attribute_Backend_Media (#4024)

Author: fballiano

app/code/core/Mage/Catalog/Model/Product/Attribute/Backend/Media.php

@@ -242,6 +242,18 @@ public function afterSave($object)
                 $image['value_id']      = $this->_getResource()->insertGallery($data);
             }
 
+            if ($storeId === 0) {
+                $image["label_use_default"] = false;
+                $image["position_use_default"] = false;
+            } else {
+                if (!isset($image["label_use_default"])) {
+                    $image["label_use_default"] = null;
+                }
+                if (!isset($image["position_use_default"])) {
+                    $image["position_use_default"] = null;
+                }
+            }
+
             $this->_getResource()->deleteGalleryValueInStore($image['value_id'], $object->getStoreId());
 
             // Add per store labels, position, disabled