ok, got the iBook back on the net

Commited some changes to CVS to address the problems ClosetPacifist reported. Everything should compile out of the box on 10.1.x... I'd be grateful if someone could test it once again.

About make clean and the -v problem, that's the only thing not yet solved; this would need hacking the global multiplatform Allegro makefile, as the clean target assumes rm to support the -v option on unix variants (like OSX is)... Really weird on 10.1.x rm didn't support it.
Hope to solve this issue too soon!