This fixes an annoying, though harmless issue: if Asterisk decides to send voicemail messages to a channel (CAS, configured as FXS), We can't do anything useful with them. So ignore them to avoid scary-looking messages (from report_bad_ioctl()). Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com> Origin: http://svnview.digium.com/svn/dahdi?view=rev&rev=9505 git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/branches/2.4@9679 a0bf4364-ded3-4de4-8d8a-66a801d63aff