fix 下单支付金额显示错误

order-application-service/src/main/java/cn/freemud/service/impl/OrderServiceImpl.java

@@ -550,7 +550,7 @@ public class OrderServiceImpl implements Orderservice {
         message.setTotal_fee(newMessage.getTotalAmount() == null ? 0 : newMessage.getTotalAmount());
         message.setOpenid(StringUtils.isBlank(newMessage.getOpenId()) ? "" : newMessage.getOpenId());
         message.setPlatform_coupon(newMessage.getPlatformCoupon() == null ? 0 : newMessage.getPlatformCoupon());
-        message.setMerchant_coupon(newMessage.getPlatformCoupon() == null ? 0 : newMessage.getPlatformCoupon());
+        message.setMerchant_coupon(newMessage.getMerchantCoupon() == null ? 0 : newMessage.getMerchantCoupon());
         message.setPaid_no(newMessage.getThirdPartTradeNo());
         message.setEndTransId(newMessage.getEndTransId());
         message.setPlatformMchId(newMessage.getPlatformMchId());