Invalidate old sources before forgetting about them. I think this prevents the possibility of an old source keeping a lock on the MidiModel via its iterator. May fix #3249.

git-svn-id: svn://localhost/ardour2/branches/3.0@7280 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 6 insertions, 4 deletions

diff --git a/libs/ardour/midi_model.cc b/libs/ardour/midi_model.cc
index bdf0516dea..566bf9d9a3 100644
--- a/libs/ardour/midi_model.cc
+++ b/libs/ardour/midi_model.cc
@@ -1125,7 +1125,9 @@ MidiModel::insert_merge_policy () const
         }
 }
                         
-
-
-
-
+void
+MidiModel::set_midi_source (MidiSource* s)
+{
+	_midi_source->invalidate ();
+	_midi_source = s;
+}