13d10582f0
We no longer have a distinct "position" property, because the "length" property defines both extent and position. But we must not call ::recompute_at_start() when the position has not changed, so here we use Region::last_length() to simulate the position property.
Please see the Ardour web site at https://ardour.org/ for all documentation..
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https://ardour.org/development.html