Add support for NOMINMAX

[Alexandre Julliard]

Francois Gouget <fgouget at free.fr> writes:

>    Why? It doesn't make a big difference but after all, if min/max are
> defined in their own header, why not take advantage of it to avoid
> duplication? (I hate duplicating code :-)

Because that's not how Windows does it. And I think it's a good thing
to avoid unnecessary dependencies between the Windows headers and the
MSVC ones.

-- 
Alexandre Julliard
julliard at winehq.com