move "rolling numbers" functionality out of ScoreDisplayNormal

stepmania/src/ScoreDisplayNormal.h

@@ -4,7 +4,7 @@
 #define SCORE_DISPLAY_NORMAL_H
 
 #include "ScoreDisplay.h"
-#include "BitmapText.h"
+#include "RollingNumbers.h"
 #include "Sprite.h"
 
 class ScoreDisplayNormal : public ScoreDisplay
@@ -14,18 +14,12 @@ public:
 
 	virtual void Init( const PlayerState* pPlayerState );
 
-	virtual void Update( float fDeltaTime );
-
 	virtual void SetScore( int iNewScore );
-	virtual void SetText( CString s );
+	virtual void SetText( CString s ) { m_text.SetText(s); }
 
 protected:
 	Sprite		m_sprFrame;
-	BitmapText	m_text;
-
-	int   m_iScore;			// the actual score
-	int   m_iTrailingScore;	// what is displayed temporarily
-	int   m_iScoreVelocity;	// how fast trailing approaches real score
+	RollingNumbers	m_text;
 };
 
 #endif