[vtkusers] Changes to vtkLocator Class

[Mike Jackson]

I see there was a commit today on this class where some methods were  
removed, namely the RetainCellListsOff() method. This broke my code  
(which may be a _good_ thing) and I was wondering if I still need to  
call that method, the functionality in the method has been moved  
elsewhere or if I can just delete my call to RetainCellListsOff and  
finish compiling my code.

Thanks for any help
-- 
Mike Jackson   Senior Research Engineer
Innovative Management & Technology Services