fix 后台视频列表报错问题

application/common/model/Vod.php

@@ -31,6 +31,9 @@ class Vod extends Base {
 
     public function listData($where,$order,$page=1,$limit=20,$start=0,$field='*',$addition=1,$totalshow=1)
     {
+        $page = $page > 0 ? (int)$page : 1;
+        $limit = $limit ? (int)$limit : 20;
+        $start = $start ? (int)$start : 0;
         if(!is_array($where)){
             $where = json_decode($where,true);
         }