Blender Git Loki

Fix T43779: Cycles texture interpolation issues

That was basically not an issue with interpolation, but rather missing wrapping
options and periodic wrapping was always used.

It's still a bit questionable why certain graphics cards were doing clamping in
the file from the report, that's not something what is expected to happen from
the settings of textures being passed to GPU. In any case this issue i still
didn't manage to reproduce on any of the available GPUs, might be something
related on driver glitch or so.

In any case CPU now should behave just fine, rest of the issues we'll need to be
able to reproduce first.