Apply Michael Baeuerle's fix for NetBSD
(as per discussion on fltk.general Sep 24 2013, Subject: Potential problem in xutf8/utf8Wrap.c)



git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@9994 ea41ed52-d2ee-0310-a9c1-e6b18d33e121