[Patches] zlib build problems.

[Mark Hammond]

> > I got rid of the #ifdef MS_WIN32 ... #endif as well :-)
>
> Strange...  This suddenly broke for me.  I can now only get it to
> compile by define ZLIB_DLL again -- but I'm not using the DLL!
>
> I can revert the checkin, or I can define the symbol in the setup
> dialog.  What would you prefer?

Very strange - I wonder if changing the referenced directories to
the .h and the .lib come from the same tree solve it?

Otherwise - In the setup dialog - I need to change this project
locally to reflect the local path to zlib, so then I can also change
the define - ie, if the change is in the .dsp, I can make it work
without hacking the source code.

Thanks,

Mark.