rem: (gdk_screen_get_default (), totem->win->window),
add: (screen, totem->win->window),
context: update_fullscreen_size (Totem *totem){	gdk_screen_get_monitor_geometry (gdk_screen_get_default (),			gdk_screen_get_monitor_at_window			(gdk_screen_get_default (),			 totem->win->window),			&totem->fullscreen_rect);}