Used by the routines at START and OBJECT_DONE.

Called when a game or a room starts (START) and again by the main loop after it has shown a new room (OBJECT_DONE), since filling the attributes with the room's colour there has painted over the heading's. The heading goes into the buffer at pixel x 192, pixel y 31, in bright white (PRINT_TEXT_SINGLE_COLOUR writes the attributes to the screen as it goes); the six digits into the buffer below it at pixel x 184, pixel y 16.