Fixes the copy/paste implementation to run on many Mac OS versions.
Checked on 10.3, 10.5, 10.6 and 10.8

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@9986 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
STR# 2973: removing ABI guard as per fltk.coredev discussion on Sep 21 - 23
           with Manolo (Subject: ABI question)



git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@9987 ea41ed52-d2ee-0310-a9c1-e6b18d33e121