[vtkusers] Switch off bounding box

[Paul Tait - OPES]

In my mainline I do this

	pickCmd = vtkCallbackCommand::New();
	pickCmd->SetCallback(Fpm3D::PickCells);
	pickCmd->SetClientData(this);
	this->Interactor->AddObserver(vtkCommand::EndPickEvent, pickCmd);

In my pick function I do this

// static
void Fpm3D::PickCells(vtkObject *caller, unsigned long eid, void
*clientdata, void *calldata)

	// switch off bounding box
	vtkInteractorStyle *ptr;
	if (ptr =
vtkInteractorStyle::SafeDownCast(fpm3d->Interactor->GetInteractorStyle())) {
		ptr->HighlightProp(NULL);
	}

BUT the bounding box stays on. Its been asked many times before in the NG
why doesn't it work?

Thanks Paul Tait

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