修复菜单获取错误

Author: Hanson

src/Http/Controllers/Admin/OfficialAccount/MenuController.php

@@ -31,7 +31,7 @@ protected function grid(bool $show = true)
 
         $form->setAction('/admin/wechat/official-account/menu');
 
-        $form->wechatMenu('menu', $config->name)->default(isset($menu) ? $menu['selfmenu_info'] : null);
+        $form->wechatMenu('menu', $config->name)->default(isset($menu['selfmenu_info']) ? $menu['selfmenu_info'] : null);
         $form->hidden('app_id')->default($config->app_id);
 
         $form->disableViewCheck()->disableEditingCheck()->disableCreatingCheck()->disableReset();