}
void
-SoloIsolateControl::master_changed (bool from_self, PBD::Controllable::GroupControlDisposition gcd, boost::shared_ptr<AutomationControl>)
+SoloIsolateControl::master_changed (bool from_self, PBD::Controllable::GroupControlDisposition gcd, boost::weak_ptr<AutomationControl>)
{
if (!_soloable.can_solo()) {
return;