Merge branch 'master' of http://114.135.61.188:53000/UIMS/Code

operation_manager/src/main/java/com/huaxu/process/service/impl/WorkFlowServiceImpl.java

@@ -368,6 +368,9 @@ public class WorkFlowServiceImpl implements WorkFlowService {
                                            String comment
                                            ) {
 
+        if(taskId==null){
+            return new ArrayList<>();
+        }
         Task task = getTaskById(taskId);