COMP: Fix uninitialized array warning in vtkXYPlotActor.
COMP: Fix uninitialized array warning in vtkXYPlotActor.

Change-Id: Ia7663f49a0485a44f6a984d57c5cd356937af3ae

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