[6/6] wined3d: take alpha from device palette entry for d3d 8 and later

[Alexander Dorofeyev]

Yes, I think so too, personally I've the impression that for dx <= 7 apps RGB 
from device palette shouldn't be copied, and maybe the only thing to do in such 
cases is storing palette index in alpha, in case the app will want to lock the 
surface. But, this is a thing for another patch. At least one game - C&C Red 
Alert 1 - enters that codepath, so care is needed.

The comment is just a reminder that the code may need further work.

Stefan Dösinger wrote:
> Am Montag, 18. Februar 2008 02:37:00 schrieb Alexander Dorofeyev:
> 
>> /*can ddraw and d3d < 8 surfaces use device's palette (d3d >= 8 feature)?*/
> No, they can't, there is no API to access them
>