wined3d: Convert between A8R8G8B8 and X8R8G8B8

[Henri Verbeet]

2008/9/29 Kjell Rune Skaaraas <kjella79 at yahoo.no>:
> Hello,
>
> A simple patch which adds converting between A8R8G8B8 and X8R8G8B8 that
> gives me one less warning to deal with while trying to make a game function.
> It zeroes out the alpha channel to be on the safe side, though it should
> never be used in the destination format anyway.
>
What does this fix, in practice?