fix crash when copy'ing latent plugins

[ardour.git] / libs / ardour / midi_automation_list_binder.cc

diff --git a/libs/ardour/midi_automation_list_binder.cc b/libs/ardour/midi_automation_list_binder.cc
index 50ce3073883ab0c701e48e5fb25c39e6b486941f..b01155b7391719ce4a5dd1b86a8b140f1bb3077b 100644 (file)
--- a/libs/ardour/midi_automation_list_binder.cc
+++ b/libs/ardour/midi_automation_list_binder.cc
@@ -29,34 +29,34 @@ MidiAutomationListBinder::MidiAutomationListBinder (boost::shared_ptr<MidiSource
        : _source (s)
        , _parameter (p)
 {
-       
+
 }
 
 MidiAutomationListBinder::MidiAutomationListBinder (XMLNode* node, Session::SourceMap const & sources)
        : _parameter (0, 0, 0)
 {
-       XMLProperty* source = node->property ("source-id");
+       XMLProperty const * source = node->property ("source-id");
        assert (source);
-       
-       XMLProperty* parameter = node->property ("parameter");
+
+       XMLProperty const * parameter = node->property ("parameter");
        assert (parameter);
 
        Session::SourceMap::const_iterator i = sources.find (PBD::ID (source->value()));
        assert (i != sources.end());
        _source = boost::dynamic_pointer_cast<MidiSource> (i->second);
 
-       _parameter = EventTypeMap::instance().new_parameter (parameter->value());
+       _parameter = EventTypeMap::instance().from_symbol (parameter->value());
 }
 
 AutomationList*
-MidiAutomationListBinder::get ()
+MidiAutomationListBinder::get () const
 {
        boost::shared_ptr<MidiModel> model = _source->model ();
        assert (model);
-       
+
        boost::shared_ptr<AutomationControl> control = model->automation_control (_parameter);
        assert (control);
-       
+
        return control->alist().get();
 }