Fix cycles "Is Singular Ray" being on for Camera rays, now is off.
Fix cycles "Is Singular Ray" being on for Camera rays, now is off.

This appears to be a wrong interpretation of the OSL docs, and it's more
convenient to have it off.

pyrochlore/cycles,tangent-opensource/coreBlackbird,tangent-opensource/coreBlackbird,pyrochlore/cycles,tangent-opensource/coreBlackbird,pyrochlore/cycles