false positives in hexahedron insidedness test
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Sohail @ LANL found a bug while stream tracing in a windblade file where a point is first found (correctly) to be outside the data and later found (incorrectly) to be inside the data because a nearby cached vtkHexahedron cell judged it close enough.