K 10
svn:author
V 6
julian
K 8
svn:date
V 27
1996-10-04T23:43:12.000000Z
K 7
svn:log
V 253
If we have no console device it is possible to be
1/ session leader
2/ Have a console device vnode (/dev/console)
3/ have  NULL pointer for a consoel tty struct.

fix the only case where the tty struct is referenced without a prior
check for existance.

END