BUGFIX: Fix memory leak
BUGFIX: Fix memory leak

Called Delete() after SetCellVisibility()
is called on the given grid instance.

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