The native VVC decoder does not yet support quality/spatial/multiview scalability. Bitstreams requiring this feature could cause crashes. Patch fixes this by skipping NAL units which are not in the base layer, warning the user while doing so. Signed-off-by: Frank Plowman <post@frankplowman.com> Signed-off-by: James Almer <jamrial@gmail.com> (cherry picked from commit bb9e4ff355684b0325d1632b89baab96cc24dc51)