[6/6] wined3d: Catch nop palette updates

[Stefan Dösinger]

On Thursday 13 October 2011 22:27:46 Henri Verbeet wrote:
> What makes it slow? Is it purely the upload of the palette itself, or
> is this because e.g. realize_palette() causes a download + upload of
> the surface?
It's the upload in realize_palette. On my system it isn't really an issue with 
the opengl renderer, even though the color conversion is done only in 
software. The gdi renderer profits more from eliminating the redundant 
changes(The game calls SetPaletteEntries with the same entries about 4 times 
per second)
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