BUGFIX: Minor typo when extracting XZ plane
BUGFIX: Minor typo when extracting XZ plane

Fix minor typo resulting in miscomputation of
the slice origin when extracting the XZ plane.

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