fix: 解决任务审核查询报错问题

jyjz-system/jyjz-system-oa/src/main/java/cn/jyjz/flowable/service/impl/FlowTaskServiceImpl.java

@@ -1315,7 +1315,7 @@ public class FlowTaskServiceImpl extends FlowServiceFactory implements IFlowTask
         query.put("searchassignee", user.getLoginname());
         query.putAll(searchQuery);
 
-        if (!userSearchId.isEmpty()) {
+        if (!StringUtils.isBlank(userSearchId)) {
             OcrUsersearch ocrUsersearch = ocrUsersearchService.selectByUserSearchId(userSearchId);
             SearchQuery additionalQuery = new SearchQuery();
             for (OcrUsersearchchild usersearchchild : ocrUsersearch.getOcrUsersearchchildList()) {