pass around a PlayerState and PlayerStageStats instead of PlayerNumber and looking things up in GameState

stepmania/src/ScoreDisplay.cpp

@@ -1,2 +1,8 @@
 #include "global.h"
 #include "ScoreDisplay.h"
+
+void ScoreDisplay::Init( const PlayerState* pPlayerState, const PlayerStageStats* pPlayerStageStats )
+{
+	m_pPlayerState = pPlayerState;
+	m_pPlayerStageStats = pPlayerStageStats;
+}