Function line

	static void CL_Draw::line(
		CL_GraphicContext  gc,
		double x1,
		double y1,
		double x2,
		double y2,
		const CL_Colord & color);

	static void CL_Draw::line(
		CL_GraphicContext  gc,
		const CL_Pointd & start,
		const CL_Pointd & end,
		const CL_Colord & color);