日志修复bug

@@ -61,14 +61,16 @@ class System extends Common
         if(Request::isAjax()){
             $data = Request::except('file');
             $key      = input('post.key') ? input('post.key') : "";
-            
+
+            $channel    = $data['channel'] ? $data['channel'] : 1;
+
             $where      = '';
             $where     .= $data['key'] ?  " a.`name` LIKE '%".$data['key']."%'"    : '1=1 ';
             $where     .= $data['nickname'] ? " AND a.nickname LIKE '%".$data['nickname']."%'" : '';
             $data_time  = $data['time'] ? explode(' - ', $data['time']) : array(date("Y-m-d 00:00:00"),date("Y-m-d H:i:s"));
             $where     .= $data_time ? "AND a.cdate BETWEEN '".$data_time[0]."' AND '".$data_time[1]."'" : '';
-            $where     .= ($data['iden']!=-1) ? " AND a.identity = ".$data['iden'] : "";
-            $where     .= ($data['channel'] && $data['channel']!=-1)  ? " AND rel.type_id = ".$data['channel'] : "";
+            $where     .= ($data['iden']!=NULL && $data['iden']!=-1) ? " AND a.identity = ".$data['iden'] : "";
+            $where     .= ($channel!=-1)  ? " AND rel.type_id = ".$channel : "";
 
             $page       = ($data['page'] - 1) * $data['limit'];
             $limit      = $data['limit'];