update gift

mallinkService/src/main/java/com/iformall/service/impl/WxCouponServiceImpl.java

@@ -227,6 +227,9 @@ public class WxCouponServiceImpl implements WxCouponService {
     @Override
     public WxCouponCVo getVoById(Long id,String tenantId) {
         WxCouponCVo wxCouponCVo = wxCouponMapper.findVoDetail(id,tenantId);
+        if(wxCouponCVo == null){
+            return null;
+        }
         List<WxMerchantVo> merchantList = wxCouponCVo.getMerchantVoList();
         if (merchantList != null) {
             merchantList = merchantList.stream().filter(