intel/compiler: Clarify why VUE is recomputed by FS
FS will get the last geometry VUE, but it still needs to recompute in case the number of position slots assigned by geometry is larger than one -- this happens when Primitive Replication is used.
FS will get the last geometry VUE, but it still needs to recompute in case the number of position slots assigned by geometry is larger than one -- this happens when Primitive Replication is used.