While reading code, I found this buglet.  If the TIOCGWINSZ fails,
mconf.c assumes 24/80 as screen size, without honoring the LINES and
COLUMNS environment variables.  This is the shorter and IMHO more
correct version.
Signed-off-by: Jan-Benedict Glaw <jbglaw@lug-owl.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>