Invalidate iterator whenever model changes.

I suspect this is an underlying cause of several tricky to reproduce bugs, but
we'll have to wait around and see...

1 files changed, 2 insertions, 0 deletions

diff --git a/libs/ardour/midi_source.cc b/libs/ardour/midi_source.cc
index f787d49168..adf28cff09 100644
--- a/libs/ardour/midi_source.cc
+++ b/libs/ardour/midi_source.cc
@@ -397,6 +397,7 @@ void
 MidiSource::drop_model ()
 {
 	_model.reset();
+	invalidate();
 	ModelChanged (); /* EMIT SIGNAL */
 }
 
@@ -404,6 +405,7 @@ void
 MidiSource::set_model (boost::shared_ptr<MidiModel> m)
 {
 	_model = m;
+	invalidate();
 	ModelChanged (); /* EMIT SIGNAL */
 }