Method IsTypeAvailable

src/road_gui.cpp:1679–1682

	}

	bool IsTypeAvailable(int cls_id, int id) const override
	{
		return IsRoadStopAvailable(this->GetSpec(cls_id, id), StationType::RoadWaypoint);
	}

	void DrawType(int x, int y, int cls_id, int id) const override
	{