xwpe bugfix

[Mark Brown <broonie@sirena.org.uk>]

I've prepared a new version of xwpe fixing the buffer overflow reported
in #68433.  Should I just upload it or is there some other procedure to
be followed?

-- 
Mark Brown  mailto:broonie@tardis.ed.ac.uk   (Trying to avoid grumpiness)
            http://www.tardis.ed.ac.uk/~broonie/
EUFS        http://www.eusa.ed.ac.uk/societies/filmsoc/