[Bug 34052] The Witcher: Character models are sometimes invisible

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=34052

--- Comment #44 from Stefan Dösinger <stefan at codeweavers.com> ---
I tested my patch on r600g and indeed some geometry that looked OK previously
now starts to flicker.

With a different test I looked what the driver returns for reads with indices <
0 and > 255. My patch works as intended in the sense that it moves the int
constants into the general range of c[-1] to c[-30]. Unfortunately the driver
returns random values for uniforms that aren't defined by our shader, whereas
Nvidia pretty reliably returns 0 for them. So instead of reading wrong but
stable values (the int constants) the game now reads wrong and unstable values.

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