[physfs] 64bit support?

[Ryan C. Gordon]

> PhysFS 2.0.2 is compiled as a static library using built-in zlib with
> Visual Studio 2012 runtime/toolchain for 64bit target platform.

Oh, wait, this is probably the bugfix:

    http://hg.icculus.org/icculus/physfs/rev/5fe3b5f3ed87

...PhysicsFS 2.0.2 probably doesn't think you have a littleendian CPU on 
64-bit Windows without that patch, so it fails to read any archive 
correctly.

--ryan.