[physfs] My shot at PHYSFS_stat

[Ryan C. Gordon]

> Yes, this was the implementation proposed by Indy Sams in his mail of
> 2010-01-28.

Whoops, sorry about that. I've backed out the changeset for now:

    http://hg.icculus.org/icculus/physfs/rev/a277a93ac1aa

> My try is at https://evilazrael.net/hg/hgwebdir.cgi/physfs/ in revision
> 4acca41b5791.

Both this work and Indy's have merit. I'm likely going to merge pieces 
of both and add you both to the credits.

--ryan.