There are a bunch of mis-typed `line_no' variables in usr.sbin/ypserv.

They're all defined as `int' but should be `size_t' instead. This also
necessitates a cast down to int on the various warnx() and errx()
calls that happen to.

The work is more trivial than generating the patch, which is why I haven't
done so.

-- 
Brian Cully						<shmit@erols.com>
``And when one of our comrades was taken prisoner, blindfolded, hung
  upside-down, shot, and burned, we thought to ourselves, `These are the
  best experiences of our lives''' -Pathology (Joe Frank, Somewhere Out There)