dsound: Use wine dxguid rather then mingw dxguid

[Roderick Colenbrander]

On Thursday 16 August 2007 12:06, Maarten Lankhorst wrote:
> Makes it cross-compilable to produce a windows binary.

I don't think this is the right way. It appears that native dxguid doesn't 
define some of the uuids needed for directdraw / directsound. You need to 
check where the missing guids are defined on windows.

In case of ddraw IDirectDraw3 stuff is in ddrawex.h whereas we define it in 
ddraw.h. Something similar could be the case for directsound.

Roderick