Fixed incorrect cell data output.

Cell data arrays were being output wrong from the vtkGeometryFilter
due to getting the wrong output cell id and using that with
CopyData().

Change-Id: I9269d94961dbadded1d1d9d46104eb06a9269e0e
Merge topic '12687_GeometryFilter_celldata_fix' into master

1e441c10 Fixed incorrect cell data output.