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/ScreenSelectGroup.cpp

@@ -33,7 +33,11 @@ ScreenSelectGroup::ScreenSelectGroup( CString sClassName ) : ScreenWithMenuEleme
 		HandleScreenMessage( SM_GoToNextScreen );
 		return;
 	}
+}
 
+void ScreenSelectGroup::Init()
+{
+	ScreenWithMenuElements::Init();
 
 	vector<Song*> aAllSongs;
 	SONGMAN->GetSongs( aAllSongs );