don't unsubscribe from messages on bgchange

stepmania/src/Actor.cpp

@@ -47,6 +47,13 @@ void Actor::SetBGMLight( int iLightNumber, float fCabinetLights )
 }
 
 void Actor::InitDefaults()
+{
+	InitState();
+
+	UnsubscribeAll();
+}
+
+void Actor::InitState()
 {
 	StopTweening();
 
@@ -88,8 +95,6 @@ void Actor::InitDefaults()
 	m_ZTestMode = ZTEST_OFF;
 	m_bZWrite = false;
 	m_CullMode = CULL_NONE;
-
-	UnsubscribeAll();
 }
 
 static bool GetMessageNameFromCommandName( const RString &sCommandName, RString &sMessageNameOut )

stepmania/src/Actor.h

@@ -30,6 +30,7 @@ public:
 	virtual ~Actor();
 	virtual Actor *Copy() const;
 	virtual void InitDefaults();
+	virtual void InitState();
 	virtual void LoadFromNode( const RString& sDir, const XNode* pNode );
 	bool IsType( const RString &sType );
 

stepmania/src/ActorFrame.cpp

@@ -74,6 +74,13 @@ void ActorFrame::InitDefaults()
 	Actor::InitDefaults();
 }
 
+void ActorFrame::InitState()
+{
+	FOREACH( Actor*, m_SubActors, a )
+		(*a)->InitState();
+	Actor::InitState();
+}
+
 void ActorFrame::LoadFromNode( const RString& sDir, const XNode* pNode )
 {
 	if( AutoLoadChildren() )

stepmania/src/ActorFrame.h

@@ -13,6 +13,7 @@ public:
 	virtual ~ActorFrame();
 
 	virtual void InitDefaults();
+	virtual void InitState();
 	void LoadFromNode( const RString& sDir, const XNode* pNode );
 	virtual Actor *Copy() const;
 

stepmania/src/Background.cpp

@@ -810,7 +810,7 @@ void BackgroundImpl::Layer::UpdateCurBGChange( const Song *pSong, float fLastMus
 		LUA->SetGlobal( "Color1", change.m_def.m_sColor1.empty() ? RString("1,1,1,1") : change.m_def.m_sColor1 );
 		LUA->SetGlobal( "Color2", change.m_def.m_sColor2.empty() ? RString("1,1,1,1") : change.m_def.m_sColor2 );
 		
-		m_pCurrentBGA->InitDefaults();
+		m_pCurrentBGA->InitState();
 		m_pCurrentBGA->PlayCommand( "On" );
 		m_pCurrentBGA->PlayCommand( "GainFocus" );