[update] 车道快照查询分页优化2

signal-optimize-service/src/main/java/net/wanji/opt/service/impl/TrendServiceImpl.java

@@ -1994,7 +1994,7 @@ public class TrendServiceImpl implements TrendService {
                     laneSnapshotDataQueryService.queryByCrossIdAndTimeSpan(crossId, start, end, pageNum, laneId);
             List<TableQueryVO.RealTimeDataElement> result = buildRealTimeList(dtoList);
             List<TableQueryVO.RealTimeDataElement> sorts = new ArrayList<>();
-            if (!CollectionUtils.isEmpty(sorts)) {
+            if (!CollectionUtils.isEmpty(result)) {
                 sorts = result.stream().sorted(Comparator.comparing(TableQueryVO.RealTimeDataElement::getTime)).collect(Collectors.toList());
             }
             return sorts;