fix skip on page change

stepmania/src/ScreenManager.h

@@ -66,12 +66,12 @@ public:
 	// Lua
 	void PushSelf( lua_State *L );
 
-public:
 	//
 	// in draw order first to last
 	//
 	Actor			*m_pSharedBGA;	// BGA object that's persistent between screens
 	void	PlaySharedBackgroundOffCommand();
+	void    ZeroNextUpdate() { m_bZeroNextUpdate = true; }
 private:
 	vector<Screen*>		m_ScreenStack;	// bottommost to topmost
 	vector<Screen*>		m_OverlayScreens;

stepmania/src/ScreenRanking.cpp

@@ -408,6 +408,10 @@ void ScreenRanking::HandleScreenMessage( const ScreenMessage SM )
 
 float ScreenRanking::SetPage( PageToShow pts )
 {
+	// This is going to take a while to load.  Possibly longer than one frame.
+	// So, zero the next update so we don't skip.
+	SCREENMAN->ZeroNextUpdate();
+
 	bool bBanner = false; 
 	bool bBannerFrame = false;
 	bool bShowCategory = false;