when capturing a midi pgm change, display the pgm num (for LT)

gtk2_ardour/editor_sections.cc

@@ -228,6 +228,10 @@ EditorSections::scroll_row_timeout ()
 void
 EditorSections::update_time_selection ()
 {
+	if (!_session) {
+		return;
+	}
+
 	_view.get_selection ()->unselect_all ();
 
 	Selection& selection (PublicEditor::instance ().get_selection ());
@@ -256,6 +260,10 @@ EditorSections::update_time_selection ()
 void
 EditorSections::selection_changed ()
 {
+	if (!_session) {
+		return;
+	}
+
 	TreeView::Selection::ListHandle_Path rows = _view.get_selection ()->get_selected_rows ();
 	if (rows.empty ()) {
 		return;

libs/ardour/midi_scene_changer.cc

@@ -339,6 +339,7 @@ MIDISceneChanger::program_change_input (MIDI::Parser& parser, MIDI::byte program
 	}
 
 	loc->set_scene_change (std::shared_ptr<MIDISceneChange> (msc));
+	loc->set_name( string_compose(_("scene [%1]"), 1+bank*128+(program & 0x7f)));
 
 	/* this will generate a "changed" signal to be emitted by locations,
 	   and we will call ::gather() to update our list of MIDI events.