优化弹出错误信息

public/assets/js/backend/entrust.js

@@ -202,7 +202,7 @@ define(['jquery', 'bootstrap', 'backend', 'table', 'form'], function ($, undefin
                     parent.Fast.api.refreshmenu();
                     return false;
                 },function (data,ret) {
-                    parent.Toastr.error("提交失败");
+                    parent.Toastr.error(ret.msg);
                     Fast.api.close();
                     return false;
                 });