int scroll_if_needed(Actor *a, Tile_coord t) { if (a == camera_actor) scroll_if_needed(t); }
bool scroll_if_needed(Actor *a, Tile_coord t) { if (a == camera_actor) return scroll_if_needed(t); else return false; }
	int scroll_if_needed(Actor *a, Tile_coord t)		{ if (a == camera_actor) scroll_if_needed(t); }