Fix BUG #12202. CellArray was still growing fixed that.
Fix BUG #12202. CellArray was still growing fixed that.

The assumption that a vtkXMLUnstructuredDataReader can read multiple pieces in
one request data is incorrect and that what's causing incorrect appending of
arrays. The issue shows up only for temporal datasets i.e. when using timesteps
in a vtu file for example (not file series).

Change-Id: Ia66970dacb62d07ebaaf978e328abb46db5b03fe

demarle/VTK,spthaolt/VTK,sumedhasingla/VTK,jmerkow/VTK,daviddoria/PointGraphsPhase1,msmolens/VTK,mspark93/VTK,SimVascular/VTK,sumedhasingla/VTK,keithroe/vtkoptix,biddisco/VTK,aashish24/VTK-old,hendradarwin/VTK,hendradarwin/VTK,mspark93/VTK,spthaolt/VTK,ashray/VTK-EVM,candy7393/VTK,johnkit/vtk-dev,msmolens/VTK,mspark93/VTK,gram526/VTK,ashray/VTK-EVM,berendkleinhaneveld/VTK,gram526/VTK,SimVascular/VTK,hendradarwin/VTK,keithroe/vtkoptix,cjh1/VTK,biddisco/VTK,gram526/VTK,sumedhasingla/VTK,sumedhasingla/VTK,collects/VTK,spthaolt/VTK,daviddoria/PointGraphsPhase1,spthaolt/VTK,berendkleinhaneveld/VTK,cjh1/VTK,biddisco/VTK,gram526/VTK,gram526/VTK,keithroe/vtkoptix,demarle/VTK,hendradarwin/VTK,johnkit/vtk-dev,SimVascular/VTK,daviddoria/PointGraphsPhase1,spthaolt/VTK,gram526/VTK,collects/VTK,ashray/VTK-EVM,SimVascular/VTK,sankhesh/VTK,sankhesh/VTK,gram526/VTK,demarle/VTK,sankhesh/VTK,jmerkow/VTK,cjh1/VTK,cjh1/VTK,spthaolt/VTK,berendkleinhaneveld/VTK,candy7393/VTK,ashray/VTK-EVM,collects/VTK,demarle/VTK,johnkit/vtk-dev,msmolens/VTK,aashish24/VTK-old,sankhesh/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,collects/VTK,sankhesh/VTK,johnkit/vtk-dev,jmerkow/VTK,cjh1/VTK,msmolens/VTK,candy7393/VTK,mspark93/VTK,sumedhasingla/VTK,demarle/VTK,candy7393/VTK,sankhesh/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,candy7393/VTK,ashray/VTK-EVM,SimVascular/VTK,jmerkow/VTK,sumedhasingla/VTK,demarle/VTK,biddisco/VTK,collects/VTK,sumedhasingla/VTK,hendradarwin/VTK,johnkit/vtk-dev,keithroe/vtkoptix,msmolens/VTK,SimVascular/VTK,hendradarwin/VTK,msmolens/VTK,sankhesh/VTK,daviddoria/PointGraphsPhase1,aashish24/VTK-old,keithroe/vtkoptix,berendkleinhaneveld/VTK,aashish24/VTK-old,SimVascular/VTK,biddisco/VTK,gram526/VTK,jmerkow/VTK,candy7393/VTK,daviddoria/PointGraphsPhase1,keithroe/vtkoptix,mspark93/VTK,ashray/VTK-EVM,candy7393/VTK,mspark93/VTK,biddisco/VTK,SimVascular/VTK,ashray/VTK-EVM,daviddoria/PointGraphsPhase1,keithroe/vtkoptix,johnkit/vtk-dev,spthaolt/VTK,keithroe/vtkoptix,demarle/VTK,mspark93/VTK,collects/VTK,jmerkow/VTK,jmerkow/VTK,jmerkow/VTK,msmolens/VTK,mspark93/VTK,aashish24/VTK-old,biddisco/VTK,msmolens/VTK,sankhesh/VTK,ashray/VTK-EVM,candy7393/VTK,cjh1/VTK,demarle/VTK,sumedhasingla/VTK,aashish24/VTK-old,johnkit/vtk-dev