Blender Git Loki

Workaround #20324: clouds (and other) textures bump mapping generates black
faces. Only happens with scons/msvc and SSE enabled for raytracing. Why this
happens exactly I don't know, I've tried to look for errors in the code but
couldn't find any, the perlin noise code somehow is generating NaN values,
but it is getting sane inputs. I suspect this is due to the render module
being compiled with /arch:SSE and other parts not. For now I've made only
the render_raytrace module compile with SSE, which seems to solve the problem,
but is mostly a workaround.