1/3 wined3d: disable hw accelerated 8-bit blits in BltOverride

[Roderick Colenbrander]

Hi,

The patches I'm sending today (and I will continue with more tomorrow)
are start to make BltOverride a nicer function. Right now it is shared
between all DirectDraw/Direct3D versions. My goal is to move
functionality to helper functions and to move DirectDraw specific
functionality back (8-bit/color keying/colorfill) in Blt/BltFast.

This first patch disables hardware accelerated 8-bit blitting. This
code will completely use the shader backend later on and won't require
hacks like 'paletteOverride'.

Regards,
Roderick Colenbrander
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