Added missing #if FLTK_ABI_VERSION >= 10303, that prevented ABI-preserving compilation.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10399 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Update CHANGES. Thanks to Greg for the patch.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10400 ea41ed52-d2ee-0310-a9c1-e6b18d33e121