完善注册

application/api/controller/User.php

@@ -1228,7 +1228,7 @@ class User extends Api
             'birthday' => $birthday,
             'openid' => $openid,
             'invite_no' => $this->myinvite(),
-            'pre_user_id' => $invite_info ? $invite_info['id'] : 0,
+            'pre_user_id' => isset($invite_info) ? $invite_info['id'] : 0,
             'invite_time' => $time,
         ];