K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2014-10-20T01:01:55.193728Z
K 7
svn:log
V 206
MFC r273219: 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

END