rearrange: games point to styles, not vice versa

stepmania/src/Game.h

@@ -7,6 +7,7 @@
 #include "GameConstantsAndTypes.h"
 
 struct lua_State;
+class Style;
 
 //
 // PrimaryMenuButton and SecondaryMenuButton are used to support using DeviceInputs that only 
@@ -31,6 +32,7 @@ class Game
 {
 public:
 	const char *		m_szName;
+	const Style * const*	m_apStyles;
 
 	bool			m_bCountNotesSeparately;	// Count multiple notes in a row as separate notes or as one note
 	bool			m_bAllowHopos;		// allow Hammer-ons and Pull-offs?  Only useful for guitar type input.

stepmania/src/GameManager.h

@@ -17,6 +17,7 @@ public:
 	~GameManager();
 
 	void GetStylesForGame( const Game* pGame, vector<const Style*>& aStylesAddTo, bool editor=false ) const;
+	const Game *GetGameForStyle( const Style *pStyle ) const;
 	void GetStepsTypesForGame( const Game* pGame, vector<StepsType>& aStepsTypeAddTo ) const;
 	const Style *GetEditorStyleForStepsType( StepsType st ) const;
 	void GetDemonstrationStylesForGame( const Game *pGame, vector<const Style*> &vpStylesOut ) const;

stepmania/src/Style.h

@@ -19,7 +19,6 @@ struct lua_State;
 class Style
 {
 public:
-	const Game *		m_pGame;			// Which Game is this Style used with?
 	bool			m_bUsedForGameplay;		// Can be used only for gameplay?
 	bool			m_bUsedForEdit;			// Can be used for editing?
 	bool			m_bUsedForDemonstration;	// Can be used for demonstration?

stepmania/src/StyleUtil.cpp

@@ -10,7 +10,7 @@ void StyleID::FromStyle( const Style *p )
 {
 	if( p )
 	{
-		sGame = p->m_pGame->m_szName;
+		sGame = GAMEMAN->GetGameForStyle(p)->m_szName;
 		sStyle = p->m_szName;
 	}
 	else