Add ReloadScreen().

stepmania/src/Screen.h

@@ -47,6 +47,9 @@ public:
 
 	/* This is called when the screen is popped. */
 	virtual void EndScreen() { }
+	
+	/* Call this to reload the current screen. */
+	virtual void ReloadScreen();
 
 	virtual void Update( float fDeltaTime );
 	virtual bool OverlayInput( const InputEventPlus &input );