-AudioRegionGainLine::AudioRegionGainLine (const string & name, AudioRegionView& r, ArdourCanvas::Group& parent, boost::shared_ptr<AutomationList> l)
- : AutomationLine (name, r.get_time_axis_view(), parent, l)
+AudioRegionGainLine::AudioRegionGainLine (const string & name, AudioRegionView& r, ArdourCanvas::Container& parent, boost::shared_ptr<AutomationList> l)
+ : AutomationLine (name, r.get_time_axis_view(), parent, l, l->parameter())