[1/5] WineD3D: Fall back to drawStridedSlow if fog coords are used

[Ivan Gyurdiev]

Stefan Dösinger wrote:
> Up to now we've been lucky that all the games requireing manual fog coords 
> haven't used vertex buffers, thus we always went through drawStridedSlow. 
> Make sure that the fog also works with vertexbuffers
>
> As for the rejected patches from yesterday, I've moved them back to the bottom 
> of the queue when I fixed them, so I will resend them later.
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This patch is probably fine, but it makes me look into the surrounding 
code [ software blending, changing the strided data ], which is still 
incredibly misleading. That should go into its own function, with the 
FIXVBO macro removed (since all such macros are evil, without 
exception), and a big comment should be added that named access to the 
strided data is only valid in the fixed function pipeline and will not 
work in the shader pipeline.  Maybe it makes sense to use two different 
structures to make this clearer - not sure.