bugfix：目录订阅收到更新事件时，sql字段update_time为空导致的报错

lishuyuan

2023-11-02 8bd2f47c9a92ffcf5ae43fae965eaefd4748e263

 src/main/java/com/genersoft/iot/vmp/service/impl/StreamPushServiceImpl.java

@@ -440,7 +440,7 @@

                }
            }
            if (streamPushItemListFroPlatform.size() > 0) {
            if (!streamPushItemListFroPlatform.isEmpty()) {
                platformGbStreamMapper.batchAdd(streamPushItemListFroPlatform);
                // 发送通知
                for (String platformId : platformForEvent.keySet()) {