Cycles / OSL:
* Fix for r53689, there are two noise types, signed and unsigned.
Caused Musgrave Texture to render differently compared to SVM backend. 

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@54291 954f8c5b-7b00-dc11-b283-0030488c597c