K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2018-05-16T18:12:49.041810Z
K 7
svn:log
V 187
teken: Unbreak syscons' use of teken

Only vt(4) initializes these callbacks non-NULL at this time, so invoke the
function pointers conditionally.

Broken in r333669.

Submitted by:	bde@

END