fix Qt Database error message when close the app

src/gui/qt/gametable/log/log.h

@@ -40,6 +40,8 @@ public:
 	~Log();
 
 public slots:
+
+        bool closeLogDb();
         void logPlayerActionMsg(QString playerName, int playerID, int action, int setValue);
 	void logNewGameHandMsg(int gameID, int handID);
 	void logNewBlindsSetsMsg(int sbSet, int bbSet, QString sbName, QString bbName);