[physfs] Failures loading from some (but not all) zip files with particular filenames

[Ryan C. Gordon]

> This is the changeset that caused this bug:
>
>       http://hg.icculus.org/icculus/physfs/rev/1eed20f2a6a8

I just pushed a fix for this in the stable-2.0 branch. It's not really 
the best thing ever, but it solves both the case you're hitting and the 
case that the quoted revision was meant to fix.

I'm thinking of changing this data from a linear array to a tree in the 
development branch, which would solve this problem better and maybe be 
faster, too.

--ryan.