IOSS: Fix ignore realn suffix for empty suffix separator

Jaswant Panchumarti (Kitware)requested to merge
(removed):ioss/for/vtk into ioss/for/vtk

backport d2dfd4c from master branch

Who needs this? paraview/paraview#21238 (closed)

Edited by Jaswant Panchumarti (Kitware)

Merge request reports