Fix Solaris warnings mentioned by Micha on fltk.coredev Sep 16 '13
in thread entitled "Re: STR 2636, clipboard notification".



git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@9977 ea41ed52-d2ee-0310-a9c1-e6b18d33e121