修复LoginController.class.php中的BUG

验证码无法显示的问题 issued by 王先生

Application/Admin/Controller/LoginController.class.php

@@ -64,6 +64,7 @@ class LoginController extends Controller {
     }
     //验证码
     public function verify(){
+    	ob_clean();
         $Verify = new \Think\Verify();
         $Verify->codeSet = '0123456789';
         $Verify->fontSize = 13;