Fix engine-state history.
authorRobin Gareus <robin@gareus.org>
Fri, 16 Jun 2017 20:32:10 +0000 (22:32 +0200)
committerRobin Gareus <robin@gareus.org>
Fri, 16 Jun 2017 20:32:56 +0000 (22:32 +0200)
commit921bdd4a51d53af26e28548641ff461080390da7
tree87dc9e39b0496890c9147e9271e4ccb20eb7e791
parent0331a9a233b071e267233313c4a8d0c91774bc4b
Fix engine-state history.

Remove old code to remove duplicate engine state which was used to
work-around a bug since 3.x saved duplicates but broke with 4.x separate
i/o devices.

Add a new variant to purge old unused states per backend (after sorting).
gtk2_ardour/engine_dialog.cc