add SetSecondsPerItem

default SetSecondsPerItem to 0.  1 isn't a useful default (almost
nothing ever scrolls that slowly).

stepmania/src/ActorScroller.cpp

@@ -22,7 +22,7 @@ ActorScroller::ActorScroller()
 	m_iNumItems = 0;
 	m_fCurrentItem = 0;
 	m_fDestinationItem = 0;
-	m_fSecondsPerItem = 1;
+	m_fSecondsPerItem = 0;
 	m_fSecondsPauseBetweenItems = 0;
 	m_fNumItemsToDraw = 7;
 	m_iFirstSubActorIndex = 0;
@@ -286,6 +286,7 @@ public:
 	LunaActorScroller() { LUA->Register( Register ); }
 
 	static int SetCurrentAndDestinationItem( T* p, lua_State *L )	{ p->SetCurrentAndDestinationItem( FArg(1) ); return 0; }
+	static int secondsperitem( T* p, lua_State *L )	{ p->SetSecondsPerItem(FArg(1)); return 0; }
 	static int scrollthroughallitems( T* p, lua_State *L )	{ p->ScrollThroughAllItems(); return 0; }
 	static int scrollwithpadding( T* p, lua_State *L )	{ p->ScrollWithPadding(FArg(1),FArg(2)); return 0; }
 	static int setfastcatchup( T* p, lua_State *L )	{ p->SetFastCatchup(BArg(1)); return 0; }
@@ -293,6 +294,7 @@ public:
 	static void Register(lua_State *L) 
 	{
 		ADD_METHOD( SetCurrentAndDestinationItem );
+		ADD_METHOD( secondsperitem );
 		ADD_METHOD( scrollthroughallitems );
 		ADD_METHOD( scrollwithpadding );
 		ADD_METHOD( setfastcatchup );

stepmania/src/ActorScroller.h

@@ -45,6 +45,7 @@ public:
 	void ScrollWithPadding( float fItemPaddingStart, float fItemPaddingEnd );
 	void SetPauseCountdownSeconds( float fSecs )			{ m_fPauseCountdownSeconds = fSecs; }
 	void SetFastCatchup( bool bOn ) { m_bFastCatchup = bOn; }
+	void SetSecondsPerItem( float fSeconds ) { m_fSecondsPerItem = fSeconds; }
 	void SetSecondsPauseBetweenItems( float fSeconds ) { m_fSecondsPauseBetweenItems = fSeconds; }
 	float	GetSecondsForCompleteScrollThrough() const;