Bug #16737: Change BlockSize type to prevent overflow
Bug #16737: Change BlockSize type to prevent overflow

Changing BlockSize type from unsigned int to int is acceptable  since
the value computed for this->BlockSize in the class is known to never
be anything but an int(see vtkwindBladeReader::FindVariableOffsets)

SimVascular/VTK,keithroe/vtkoptix,keithroe/vtkoptix,SimVascular/VTK,SimVascular/VTK,SimVascular/VTK,SimVascular/VTK,SimVascular/VTK,keithroe/vtkoptix,keithroe/vtkoptix,keithroe/vtkoptix,SimVascular/VTK,keithroe/vtkoptix,SimVascular/VTK,keithroe/vtkoptix,keithroe/vtkoptix