Previously, OptionRowHandler was owned and freed by

ScreenOptionsMaster (and ScreenOptionsManageProfiles).
Make it owned by OptionRow; the only pointer to them
is where they're stored in the OptionRow.  This
eliminates the remaining association between m_OptionRowHandlers
and m_pRows; that was confusing, because they're in
different places, and aren't always the same size.  It
also simplifies using OptionRowHandlers.

stepmania/src/ScreenOptionsMaster.h

@@ -13,8 +13,6 @@ public:
 
 protected:
 	int m_iChangeMask;
-
-	vector<OptionRowHandler*> m_OptionRowHandlers;
 	
 protected:
 	virtual void HandleScreenMessage( const ScreenMessage SM );