Blender Git Loki

Fix T43550: Bug in Cycles Bake Texture

Issue was caused by the changes in 7b16fda which changed the initial
state for rng. This commit makes it so the same initial hash is used
(which solves the regression without distorting AA-looking image.

It also makes it so OpenCL compiler is happy about this code (before
this change it'll complain about trying to cast private variable to
global one).