Ed Maste 0e53ac55b7 Do nothing in vt_upgrade if there is no vt driver
Previously, if no drivers attached at boot we would panic with
"vtbuf_fill_locked begin.tp_row 0 must be < screen height 0".

PR:		192248
Reviewed by:	ray
MFC after:	3 days
Sponsored by:	DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D954
2014-10-17 13:55:45 +00:00
..
2014-09-12 14:07:20 +00:00
2014-09-12 14:07:20 +00:00