[vtkusers] missing vtkActor::Update()

[mshore]

The code I'm working with makes a call to vtkActor::Update(), I'm presuming to 
update the pipeline and actor components before it updates the renderer 
(which, since this is vtk2CAVE, is not the vtkRenderer). I can find the method 
in 3.2, but not in 4.0. I'm assuming it has been eliminated, but wonder now 
what to replace with.

Thanks
Mike Shore
DIVERSE Project, Virginia Tech