remove Screen.h dep on ScreenManager.h. (this looked more useful before pulling in the higher-level includes, but still seems like the right thing to do)

stepmania/src/Screen.h

@@ -9,14 +9,17 @@
 #include "GameInput.h"
 #include "MenuInput.h"
 #include "StyleInput.h"
-#include "ScreenManager.h"
 #include "ThemeMetric.h"
 
+class Screen;
+typedef Screen* (*CreateScreenFn)(const CString& sClassName);
+void RegisterScreenClass( const CString& sClassName, CreateScreenFn pfn );
+
 // Each Screen class should have a REGISTER_SCREEN_CLASS in its CPP file.
 #define REGISTER_SCREEN_CLASS( className ) \
 	static Screen* Create##className( const CString &sName ) { Screen *pRet = new className( sName ); pRet->Init(); return pRet; } \
 	struct Register##className { \
-		Register##className() { SCREENMAN->Register(#className,Create##className); } \
+		Register##className() { RegisterScreenClass( #className,Create##className); } \
 	}; \
 	static Register##className register_##className;
 

stepmania/src/ScreenManager.cpp

@@ -40,7 +40,7 @@ static Preference<bool> g_bConcurrentLoading( "ConcurrentLoading",	false );
 // Screen registration
 static map<CString,CreateScreenFn>	*g_pmapRegistrees = NULL;
 
-void ScreenManager::Register( const CString& sClassName, CreateScreenFn pfn )
+void RegisterScreenClass( const CString& sClassName, CreateScreenFn pfn )
 {
 	if( g_pmapRegistrees == NULL )
 		g_pmapRegistrees = new map<CString,CreateScreenFn>;

stepmania/src/ScreenManager.h

@@ -23,10 +23,6 @@ typedef Screen* (*CreateScreenFn)(const CString& sClassName);
 class ScreenManager
 {
 public:
-	// Every screen should register its class at program initialization.
-	static void Register( const CString& sClassName, CreateScreenFn pfn );
-
-	
 	ScreenManager();
 	~ScreenManager();