/*
 *  call-seq:
 *     quit  ->  nil
 *
 *  Quit Rubygame. This should be used before your program terminates,
 *  especially if you have been using a fullscreen Screen! (Otherwise,
 *  the desktop resolution might not revert to its previous setting on
 *  some platforms, and your users will be frustrated and confused!)
 */
VALUE rbgm_quit(VALUE module)
{
        SDL_Quit();
        return Qnil;
}