add FinishTweening

stepmania/src/Actor.cpp

@@ -341,6 +341,11 @@ void Actor::StopTweening()
 	ASSERT( m_TweenInfo.empty() );
 }
 
+void Actor::FinishTweening()
+{
+	m_current = DestTweenState();
+	StopTweening();
+}
 
 
 void Actor::ScaleTo( const RectI &rect, StretchType st )

stepmania/src/Actor.h

@@ -139,6 +139,7 @@ public:
 
 	virtual void BeginTweening( float time, TweenType tt = TWEEN_LINEAR );
 	virtual void StopTweening();
+	virtual void FinishTweening();
 	virtual float GetTweenTimeLeft() const;	// Amount of time until all tweens have stopped
 	virtual TweenState& DestTweenState()	// where Actor will end when its tween finish
 	{