/* Clears a calibration point from the given buffer.  */
static void clear_calibration_point(const rtouch_point_t *p_point)
/* Clears a calibration point from the given buffer.  */
static void clear_calibration_point(const rtouch_point_t *p_point)
{
	lcd_set_foreground_color(UNI_COLOR_WHITE);
	lcd_draw_filled_rectangle(p_point->x - POINTS_SIZE / 2,
			p_point->y - POINTS_SIZE / 2,
			p_point->x - POINTS_SIZE / 2 + POINTS_SIZE,
			p_point->y - POINTS_SIZE / 2 + POINTS_SIZE
	);
}