fix[litemall-wx]: 显示错误信息

litemall-wx/pages/checkout/checkout.js

@@ -199,9 +199,7 @@ Page({
         });
 
       } else {
-        wx.redirectTo({
-          url: '/pages/payResult/payResult?status=0&orderId=' + orderId
-        });
+        util.showErrorToast(res.errmsg);
       }
     });
   }