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/vmanager/bean/StreamContent.java

old mode 100644
new mode 100755
@@ -116,6 +116,9 @@
        if (streamInfo.getFmp4() != null) {
            this.fmp4 = streamInfo.getFmp4().getUrl();
        }
        if (streamInfo.getHttps_fmp4() != null) {
            this.https_fmp4 = streamInfo.getHttps_fmp4().getUrl();
        }
        if (streamInfo.getWs_fmp4() != null) {
            this.ws_fmp4 = streamInfo.getWs_fmp4().getUrl();
        }