DirectX's FFP normalizes the zero vector to the zero vector, but GLSL
normalizes them to all NaN.

This patch creates ffp_normalize, which normalizes vectors but
has DirectX's behavior on 0 vectors. Further patches in this set switch
other calls from GLSL's normalize to the 0-safe version.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=36564

Since they act like values.
Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Some applications (e.g. UE4) require the DriverVersion string in the registry.
Signed-off-by: Mykhailo Skorokhodov <mykhailo.skorokhodov@globallogic.com>

Signed-off-by: David Kahurani <k.kahurani@gmail.com>

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55351Signed-off-by: David Kahurani <k.kahurani@gmail.com>

Signed-off-by: Zhao Yi <zhaoyi@uniontech.com>

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55291