完善后台修改会员

application/admin/controller/Vip.php

@@ -54,7 +54,7 @@ class Vip extends Backend
                 $params = $this->preExcludeFields($params);
 
                 if ($ids == 1) {
-                    if ($params['growthvalue'] != 0) {
+                    if (isset($params['growthvalue']) && $params['growthvalue'] != 0) {
                         $this->error('普通会员等级所需成长值只能为0');
                     }
                 }