- Fix already defined command warnings for minimize

- Fix recursive CL_Shutdown warning and "command already defined" warnings when quitting while playing on a server that changed the gamedir.

code/qcommon/qcommon.h

@@ -974,7 +974,7 @@ void CL_InitKeyCommands( void );
 
 void CL_Init( void );
 void CL_Disconnect( qboolean showMainMenu );
-void CL_Shutdown(char *finalmsg, qboolean disconnect);
+void CL_Shutdown(char *finalmsg, qboolean disconnect, qboolean quit);
 void CL_Frame( int msec );
 qboolean CL_GameCommand( void );
 void CL_KeyEvent (int key, qboolean down, unsigned time);