修正平台Keepalive错误

src/main/java/com/genersoft/iot/vmp/gb28181/event/platformKeepaliveExpire/PlatformKeepaliveExpireEventLister.java

@@ -64,6 +64,7 @@ public class PlatformKeepaliveExpireEventLister implements ApplicationListener<P
             // 有3次未收到心跳回复, 设置平台状态为离线, 开始重新注册
             logger.warn("有3次未收到心跳回复,标记设置平台状态为离线, 并重新注册 平台国标ID：" + event.getPlatformGbID());
             publisher.platformNotRegisterEventPublish(event.getPlatformGbID());
+            parentPlatformCatch.setKeepAliveReply(0);
         }else {
             // 再次发送心跳
             String callId = sipCommanderForPlatform.keepalive(parentPlatform);