root = new XMLNode("Ardour");
- const MIDI::Manager::PortList& ports = MIDI::Manager::instance()->get_midi_ports();
-
- for (MIDI::Manager::PortList::const_iterator i = ports.begin(); i != ports.end(); ++i) {
- root->add_child_nocopy((*i)->get_state());
- }
+ MIDI::Manager* mm = MIDI::Manager::instance();
+
+ if (mm) {
+ const MIDI::Manager::PortList& ports = mm->get_midi_ports();
+
+ for (MIDI::Manager::PortList::const_iterator i = ports.begin(); i != ports.end(); ++i) {
+ root->add_child_nocopy((*i)->get_state());
+ }
+ }
root->add_child_nocopy (get_variables ());