Fix visitbridge to allow usage of the mfix reader.

Change-Id: I492d4f9494a44c0cbcd30b913098788bac231384
Merge topic 'bug_14102_cgns' into visitbridge-mfix

Change-Id: Ib7cf4ed5a2b22d22cf57284c4391f699ab14a49e
Merge topic 'visitbridge-mfix' into next

ff92bb8 Merge topic 'bug_14102_cgns' into visitbridge-mfix
64b03fe Fix visitbridge to allow usage of the mfix reader.