修复删除记录时传递的skn为空的bug

Code Review By Rock Zhang

@@ -364,7 +364,7 @@ class UserModel
 
                 $record = array();
                 $record['product_name'] = $val['product_name'];
-                $record['product_id'] = $val['product_id'];
+                $record['product_skn'] = $val['product_skn'];
                 $record['link'] = Helpers::url('/product/show_' . $val['product_skn'] . '.html');
                 $record['image'] = !empty($val['image']) ? Helpers::getImageUrl($val['image'], 447, 596) : '';
                 $record['sales_price'] = Helpers::transPrice($val['sales_price']);