fix bug

application/Admin/Controller/LevelController.class.php

@@ -122,6 +122,7 @@ class LevelController extends AdminbaseController {
 			$experlevel=$this->experlevel_model;
 			if($experlevel->create()){
 				$experlevel->addtime=time();
+                $experlevel->thumb = $experlevel->thumb_mark;
 				$result=$experlevel->add();
 				if($result!==false){
                     $action="添加会员等级：{$result}";