fix crashing bug where pan_tracks.front() was used without checking for pan tracks...

git-svn-id: svn://localhost/ardour2/branches/3.0@9842 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/gtk2_ardour/audio_time_axis.cc b/gtk2_ardour/audio_time_axis.cc
index 6772f7b9fab008ef678e8e08127f6d939e8188e7..d06652b648e5483589f3e5f0cf635dda705034b7 100644 (file)
--- a/gtk2_ardour/audio_time_axis.cc
+++ b/gtk2_ardour/audio_time_axis.cc
@@ -159,14 +159,14 @@ AudioTimeAxisView::audio_view()
 guint32
 AudioTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
 {
-       set_gui_property ("visible", "yes");
+       set_gui_property ("visible", true);
        return TimeAxisView::show_at (y, nth, parent);
 }
 
 void
 AudioTimeAxisView::hide ()
 {
-       set_gui_property ("visible", "no");
+       set_gui_property ("visible", false);
        TimeAxisView::hide ();
 }
 
@@ -460,14 +460,14 @@ AudioTimeAxisView::build_automation_action_menu (bool for_selection)
        automation_items.push_back (CheckMenuElem (_("Fader"), sigc::mem_fun (*this, &AudioTimeAxisView::update_gain_track_visibility)));
        gain_automation_item = dynamic_cast<CheckMenuItem*> (&automation_items.back ());
        gain_automation_item->set_active ((!for_selection || _editor.get_selection().tracks.size() == 1) && 
-                                         string_is_affirmative (gain_track->gui_property ("visible")));
+                                         (gain_track && string_is_affirmative (gain_track->gui_property ("visible"))));
 
        _main_automation_menu_map[Evoral::Parameter(GainAutomation)] = gain_automation_item;
 
        automation_items.push_back (CheckMenuElem (_("Pan"), sigc::mem_fun (*this, &AudioTimeAxisView::update_pan_track_visibility)));
        pan_automation_item = dynamic_cast<CheckMenuItem*> (&automation_items.back ());
        pan_automation_item->set_active ((!for_selection || _editor.get_selection().tracks.size() == 1) &&
-                                        string_is_affirmative (pan_tracks.front()->gui_property ("visible")));
+                                        (!pan_tracks.empty() && string_is_affirmative (pan_tracks.front()->gui_property ("visible"))));
 
        set<Evoral::Parameter> const & params = _route->pannable()->what_can_be_automated ();
        for (set<Evoral::Parameter>::iterator p = params.begin(); p != params.end(); ++p) {