优化超级签售空提醒

Application/Mobile/Controller/SsgController.class.php

@@ -675,15 +675,18 @@ class SsgController extends BaseController {
                 'limit' => $i,
             ));  // @todo: 并发授权码已分配的情况
             $code = $list['data']['list'][$i-1]['code'];
+            if($code){
                 $codeExists = M('game_supersign', 'tab_')->field('id')->where(array(
                     'ticket' => $code,
                 ))->find();
                 if (!$codeExists) {
                     break;
                 }
+            }else{
+                $this->assign("error","超级签已售罄~");
+            }
             $i ++;
         }
-
         $game = M('game', 'tab_')->where(array(
             'id' => $gameId,
         ))->find();