Fix uninitiazed array warning in vtkBSPlineInterpolator.
Fix uninitiazed array warning in vtkBSPlineInterpolator.

I suspect the warning is spurious.  It occurs with gcc 4.9.2 but not
with any other compilers, and valgrind does not report a UMR.

sankhesh/VTK,mspark93/VTK,demarle/VTK,demarle/VTK,SimVascular/VTK,sumedhasingla/VTK,sumedhasingla/VTK,gram526/VTK,gram526/VTK,jmerkow/VTK,keithroe/vtkoptix,demarle/VTK,candy7393/VTK,mspark93/VTK,sankhesh/VTK,sankhesh/VTK,msmolens/VTK,jmerkow/VTK,keithroe/vtkoptix,SimVascular/VTK,sankhesh/VTK,demarle/VTK,sumedhasingla/VTK,gram526/VTK,sumedhasingla/VTK,SimVascular/VTK,gram526/VTK,keithroe/vtkoptix,mspark93/VTK,candy7393/VTK,msmolens/VTK,jmerkow/VTK,mspark93/VTK,jmerkow/VTK,msmolens/VTK,jmerkow/VTK,sankhesh/VTK,msmolens/VTK,candy7393/VTK,candy7393/VTK,sankhesh/VTK,msmolens/VTK,keithroe/vtkoptix,candy7393/VTK,sumedhasingla/VTK,mspark93/VTK,gram526/VTK,demarle/VTK,SimVascular/VTK,sumedhasingla/VTK,jmerkow/VTK,sumedhasingla/VTK,msmolens/VTK,SimVascular/VTK,jmerkow/VTK,jmerkow/VTK,sankhesh/VTK,SimVascular/VTK,demarle/VTK,gram526/VTK,candy7393/VTK,SimVascular/VTK,keithroe/vtkoptix,keithroe/vtkoptix,msmolens/VTK,sankhesh/VTK,mspark93/VTK,gram526/VTK,gram526/VTK,candy7393/VTK,SimVascular/VTK,sumedhasingla/VTK,mspark93/VTK,candy7393/VTK,keithroe/vtkoptix,keithroe/vtkoptix,msmolens/VTK,demarle/VTK,demarle/VTK,mspark93/VTK