差旅报销bug修复

zjugis-business/src/main/java/com/zjugis/business/flow/travelcost/service/TravelCostServiceImpl.java

@@ -259,7 +259,7 @@ public class TravelCostServiceImpl implements TravelCostService {
             }
             result.put(projectId, totalAmount);
         }
-        return null;
+        return result;
     }
 
     private PageResult<TravelCostRespVO> getTravelCostRespVOPageResult(PageResult<TravelCostDO> pageResult) {