Use Init() for all screens, so we can set state before the base class

members are loaded--they'll see resets, score finalization, etc.  It
also results in smaller code, due to a g++ bug that causes constructors
to be emitted several times.

stepmania/src/ScreenMapControllers.h

@@ -14,6 +14,7 @@ class ScreenMapControllers : public ScreenWithMenuElements
 {
 public:
 	ScreenMapControllers( CString sName );
+	virtual void Init();
 	virtual ~ScreenMapControllers();
 
 	virtual void Update( float fDeltaTime );