use SlotGuard

include/server/IServerState.h

@@ -1,13 +1,14 @@
 #pragma once
 
 #include <server/IServerSocket.h>
+#include <td/misc/SlotGuard.h>
 
 namespace td {
 namespace server {
 
 class Server;
 
-class IServerState {
+class IServerState : public utils::SlotGuard {
   protected:
 	void SendPacket(PlayerID a_Id, const protocol::PacketBase& a_Packet);
 	void SetNewState(const std::shared_ptr<IServerState>& a_NewState);