Cycles: Fix for camera-in-volume detection
Cycles: Fix for camera-in-volume detection

Ray actually should have infinite length, so we can detect camera in a volume
which is bigger that the far clipping of the camera.

This might also give some speedup (wouldn't expect much tho) because we don't
need to re-calculate ray direction and length after every bounce now.

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