libstage: simplify aabb_to_rect to operate on node

Initially it seemed plausible this might have to work on more than
stage nodes, like composite or ephemeral constructions involving the
same aabb/pos/origin types, but it doesn't seem to be the case for
now so operate on the higher order node and stage types.

Also makes it simpler to stick logic conditional on node state inside
the function...

0 files changed, 0 insertions, 0 deletions