bugfix：编辑国标设备时，若目录订阅周期本来不为0时不生效

lishuyuan

2023-10-27 da7889bf67ec400c96c4a68e61f8b6b4fbeef585

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package com.genersoft.iot.vmp.media.zlm.dto;
 
public class ServerKeepaliveData {
}