Now that we have a index_range_invalid flag, we can just use that rather
than calling vbo_validated_drawrangeelements directly and returning.
NOTE: This is a candidate for release branches.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Roland Scheidegger <sroland@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com>