Pass on admin state if the admin leaves the network game, so that someone else can start the game.

src/gui/qt/guiwrapper.h

@@ -105,6 +105,7 @@ public:
 	void SignalNetClientPlayerJoined(unsigned playerId, const std::string &playerName, PlayerRights rights);
 	void SignalNetClientPlayerChanged(unsigned playerId, const std::string &newPlayerName);
 	void SignalNetClientPlayerLeft(unsigned playerId, const std::string &playerName);
+	void SignalNetClientNewGameAdmin(unsigned playerId, const std::string &playerName);
 	void SignalNetClientChatMsg(const std::string &playerName, const std::string &msg);
 	void SignalNetClientWaitDialog();