propagate ProcessMessages. There are still some cases where we're

handling children directly; as those come up, they'll either propagate this
message or (preferably) be converted to use AddChild and let ActorFrame
do the work.

stepmania/src/ActorFrame.cpp

@@ -228,6 +228,18 @@ void ActorFrame::UpdateInternal( float fDeltaTime )
 	}
 }
 
+void ActorFrame::ProcessMessages( float fDeltaTime )
+{
+	Actor::ProcessMessages( fDeltaTime );
+
+	// update all sub-Actors
+	for( vector<Actor*>::iterator it=m_SubActors.begin(); it!=m_SubActors.end(); ++it )
+	{
+		Actor *pActor = *it;
+		pActor->ProcessMessages( fDeltaTime );
+	}
+}
+
 #define PropagateActorFrameCommand( cmd ) \
 	void ActorFrame::cmd()				\
 	{									\

stepmania/src/ActorFrame.h

@@ -37,6 +37,7 @@ public:
 	virtual void RunCommandsOnLeaves( const LuaReference& cmds, Actor* pParent ); /* but not on self */
 
 	virtual void UpdateInternal( float fDeltaTime );
+	virtual void ProcessMessages( float fDeltaTime );
 	virtual void DrawPrimitives();
 
 	// propagated commands