K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2004-07-22T23:16:12.000000Z
K 7
svn:log
V 298
If you insert a pccard modem and then eject it, you get a panic.  This
happens because the sio device was never opened and com->tp is
therefore NULL.  ttygone can't swallow a NULL, so guard against that
possibility.  Other places in this function make similar checks, so I
believe this is correct.

END