Add string length checking to function COM_StripExtension. This fixes the R_RemapShader buffer overflow exploit that can be found here:

http://milw0rm.com/exploits/1750

code/q3_ui/ui_saveconfig.c

@@ -85,7 +85,7 @@ static void UI_SaveConfigMenu_SaveEvent( void *ptr, int event ) {
 		return;
 	}
 
-	COM_StripExtension(saveConfig.savename.field.buffer, configname );
+	COM_StripExtension(saveConfig.savename.field.buffer, configname, sizeof(configname));
 	trap_Cmd_ExecuteText( EXEC_APPEND, va( "writeconfig %s.cfg\n", configname ) );
 	UI_PopMenu();
 }