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Daniel Stone authored
Following on from b8c16c99 , extend the family tree being tested by place_above and place_below a little, ensuring that subsurfaces can't be placed above or below surfaces which are related to them, but aren't their immediate parent or sibling. Signed-off-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
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