fix queued commands ending up in m_current, causing all future tweens to inherit it

stepmania/src/Actor.cpp

@@ -387,6 +387,10 @@ void Actor::UpdateTweening( float fDeltaTime )
 		{
 			m_current = TS;
 
+			// don't inherit the queued state's command.  We keep having to do this.
+			// Does sCommandName belong in TweenInfo, instead of TweenState?
+			m_current.sCommandName = "";
+			
 			// delete the head tween
 			m_Tweens.pop_front();
 		}