PositionSave::result_type
PositionSave::operator()(argument_type ss) {
	// ss = special sprite (actor)
	p.insert(
	 *new std::pair<GameSprite *const, SDL_Rect>(ss, *new SDL_Rect));
	p[ss].x = ss->GetX();
	p[ss].y = ss->GetY();
} // PositionSave()