clean up RageTextureManager prefs, ModelManager prefs

add pref DelayedModelDelete

stepmania/src/ModelManager.h

@@ -15,6 +15,26 @@
 
 #include <map>
 
+struct ModelManagerPrefs
+{
+	bool m_bDelayedUnload;
+
+	ModelManagerPrefs()
+	{
+		m_bDelayedUnload = false;
+	}
+	ModelManagerPrefs( bool bDelayedUnload )
+	{
+		m_bDelayedUnload = bDelayedUnload;
+	}
+
+	bool operator!=( const ModelManagerPrefs& rhs )
+	{
+		return 
+			m_bDelayedUnload != rhs.m_bDelayedUnload;
+	}
+};
+
 class ModelManager
 {
 public:
@@ -25,9 +45,14 @@ public:
 	void UnloadModel( RageModelGeometry *m );
 //	void ReloadAll();
 
+	bool SetPrefs( ModelManagerPrefs prefs ) { m_Prefs = prefs; return true; }
+	ModelManagerPrefs GetPrefs() { return m_Prefs; }
+
 protected:
 
 	std::map<CString, RageModelGeometry*> m_mapFileToModel;
+
+	ModelManagerPrefs m_Prefs;
 };
 
 extern ModelManager*	MODELMAN;	// global and accessable from anywhere in our program