fix bug

mallinkBApi/src/main/java/com/iformall/controller/WxMicroPayController.java

@@ -215,6 +215,8 @@ public class WxMicroPayController extends BaseController {
         record.setBUserId(getUser().getId());
         record.setOrderId(orderId);
 
+        WxPayOrder po = wxPayOrderService.getById(payOrderId);
+        record.setPayVendor(po.getPayVendor());
         try {
             return wxPayOrderService.payOrderReverse(record);
         } catch (MallinkException e) {