some fixes from Iain Holmes <iain@prettypeople.org>, change max_speed to

2002-12-13  Bastien Nocera  <hadess@hadess.net>

        * src/cd-drive.c: (parse_sg_line), (add_linux_cd_recorder),
	(add_linux_cd_drive), (linux_scan), (scan_for_cdroms):
	* src/cd-drive.h: some fixes from Iain Holmes <iain@prettypeople.org>,
	change max_speed to max_speed_write, and add max_speed_read
	* src/totem-cd-selection.h: use (void) when there are no args, not just
	()