page=-1时报错

@@ -79,7 +79,7 @@ class HelperSearch
         //总页数
         $result['page_total'] = isset($data['product']['page_total']) ? $data['product']['page_total'] : '';
         self::$pageTotal = $result['page_total'];
-        self::$total = $data['product']['total'];
+        self::$total = isset($data['product']['total']) ? $data['product']['total'] : 0;
         //当前页
         self::$page = $result['page'] = isset($data['product']['page']) ? $data['product']['page'] : '';
         //筛选条件