There's no point in separating scale and luminance since they're
uploaded at the same time. We still want to separate the stages
though.

Note that the fix is only implemented in the arbfp and atifs fragment
pipeline. Unfortunately nvrc doesn't support dot3 as alpha operation.

msxml3: Use CP_UNIXCP instead of CP_ACP in libxmlFatalError as the input string is one generated by a native OS function.