2878fa95ab
This solves an issue raised in fltk.general : Fl_Printer errors - how can I interpret them? https://www.fltk.org/newsgroups.php?s38419+gfltk.general+v38427
All FLTK header files are in the FL subdirectory of the fltk.framework. Image header files are located in "fltk.framework/Headers/FL/images/".