win32 updates.

[Ryan C. Gordon]

Greg's put some patches into CVS for win32. Amonge other things, it
defines INVALID_SET_FILE_POINTER for obsolete development environments.
Apparently, it was 0xFFFFFFFF.

If the Platform SDK stuff gives you trouble, you can also define
DISABLE_NT_SUPPORT in the project and it will avoid compiling in that
code. In many ways, this cripples the usefulness of PhysicsFS, but if you
are targetting Win95/98/ME, that may not be an issue for you.

The win32 stuff isn't complete, but theoretically it should compile.  :)

Send problems/complaints/etc to the mailing list.

--ryan.