Avoid freeing NULL.



git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@9999 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
When reading XPMs, don't parse more than 2 hex digits
in \xff style escape sequences.

Also, 10000'th commit. :P



git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10000 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
While investigating STR#2991, noted (but did not remove) misleading comments.



git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10001 ea41ed52-d2ee-0310-a9c1-e6b18d33e121