允许换绑微信号

application/api/controller/User.php

@@ -730,7 +730,7 @@ class User extends Api
         $user->wechat_openid = $wechat_openid;
         $user->save();
 
-        $this->success('success',$this->userInfo('return'));
+        $this->success('绑定成功',$this->userInfo('return'));
     }