Explicitly initialize parent in the copy constructor

libs/ardour/automatable.cc

@@ -57,6 +57,7 @@ Automatable::Automatable(Session& session)
 
 Automatable::Automatable (const Automatable& other)
         : ControlSet (other)
+        , Slavable ()
         , _a_session (other._a_session)
 {
         Glib::Threads::Mutex::Lock lm (other._control_lock);

libs/ardour/presentation_info.cc

@@ -145,7 +145,8 @@ PresentationInfo::PresentationInfo (order_t o, Flag f)
 	/* OrderSet is set */
 }
 PresentationInfo::PresentationInfo (PresentationInfo const& other)
-	: _order (other.order())
+	: PBD::Stateful ()
+	, _order (other.order())
 	, _flags (other.flags())
 	, _color (other.color())
 {