fix refund num bug

@@ -278,11 +278,12 @@ const _getUserOrder = (uid, type, page) => {
                     good.returnUrl = helpers.urlFormat('/me/return');
 
                 // 判断该订单是否可以退换货
-                } else if (good.buyNumber !== good.refund) {
+                } else if (good.buyNumber !== good.refundNum) {
                     canRefund = true;
                 }
             });
 
+
             item.showRefund = hasRefund;
             item.hideChange = !canRefund;