reduce dependency

stepmania/src/ComboGraph.cpp

@@ -2,6 +2,7 @@
 #include "ComboGraph.h"
 #include "ThemeManager.h"
 #include "RageLog.h"
+#include "StageStats.h"
 
 const int MinComboSizeToShow = 5;
 

stepmania/src/ComboGraph.h

@@ -3,10 +3,10 @@
 
 #include "ActorFrame.h"
 #include "PlayerNumber.h"
-#include "StageStats.h"
 #include "Sprite.h"
 #include "BitmapText.h"
 
+struct StageStats;
 class ComboGraph: public ActorFrame
 {
 public:

stepmania/src/GraphDisplay.cpp

@@ -4,6 +4,7 @@
 #include "RageTextureManager.h"
 #include "RageDisplay.h"
 #include "RageUtil.h"
+#include "StageStats.h"
 
 //#define DIVIDE_LINE_WIDTH			THEME->GetMetricI(m_sName,"TexturedBottomHalf")
 

stepmania/src/GraphDisplay.h

@@ -3,7 +3,6 @@
 
 #include "ActorFrame.h"
 #include "PlayerNumber.h"
-#include "StageStats.h"
 #include "RageTexture.h"
 
 class GraphDisplay: public ActorFrame