BUG #14202. Modify arrays when changed.

vtkMFIXReader was not modifying reused arrays when the contents were changed.
That was causing ParaView to report incorrect array bounds. Fixed that.

Change-Id: I625e5c3d21735dc84bf5798da82915bd9d0c6d08
Merge topic '14202_fix_mfix_mtime' into master

22e0a23f BUG #14202. Modify arrays when changed.