修复加价购商品图片显示错误的bug

Code Review By Rock Zhang

@@ -708,11 +708,9 @@ class CartModel
                 }
 
                 // 缩略图
-                foreach ($val['images_list'] as $image) {
-                    $thumbImageList[] = array(
-                        'img' => Helpers::getImageUrl($image['image_url'], 60, 60)
-                    );
-                }
+                $thumbImageList[] = array(
+                    'img' => Helpers::getImageUrl($val['color_image'], 60, 60)
+                );
 
                 // 商品库存总数
                 $totalStorageNum += $colorNum;