Defines the SceneObjectPropSet symbol.  That exists in studiomax but not xsi and previous to this revision that symbol was not defined in the abstract interface.
Defines the SceneObjectPropSet symbol.  That exists in studiomax but not xsi and previous to this revision that symbol was not defined in the abstract interface.

git-svn-id: a3b746cc1383a42926249ed33eaccad697259b1b@13891 896c8824-d3f5-0310-9c61-ac502b9a79dc

blurstudio/cross3d