Log Message:
Since ncurses is not buildlinked, then make sure that
curses is not used. This is so for pkgsrc-users who have a curses
and they use LOCALBASE=/usr, it won't be detected, configured,
and built with it. (Because then could break devel/SDL build later
due to missing libncurses.la.)

The real fix is to improve the buildlink system to work
with LOCALBASE=/usr too. But this will work until that is done.