缴费单列表添加站名，添加缴费状态查询条件

application/em/controller/Payment.php

@@ -76,7 +76,7 @@ class Payment extends Base
             $this->assign('search_text','');
         }
         //缴费状态
-        if($payment_status){
+        if($payment_status !== ''){
             switch ($payment_status) {
                 case '0':
                     $this->assign('status',$payment_status);