修改品牌一个参数错误

@@ -1316,15 +1316,13 @@ class HelperSearch
      */
     public static function getBannerFormat($banner, $brand) 
     {
-        
         // 根据品牌Id获取品牌banner图
         if (isset($banner['banner'])) { 
             $bannerImg = Helpers::getImageUrl($banner['banner'], '', 150);
         }
         
         $is_favorite = false;
-        $shopName = false;
-        if(isset($brand)){
+        if(isset($brand['is_favorite'])){
             // 获取是否收藏
             if ($brand['is_favorite'] == 'Y') {
                 $is_favorite = true;