first filtering out of invalid primitives
improved filtering out of invalid primitives
filtering of invalid data working for SAH builders
morton builder also filters out invalid primitives
bugfix in nan filtering for morton builder
enabling geometry verify in debug mode
Added garbage geometry test to verify.
Merge branch 'devel' of https://github.com/embree/embree into devel
Merge branch 'devel' of https://github.com/embree/embree into devel