fix, PEBKAC, for non-mremap() case in resz_gbs() actually munmap() the old array

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'fix/general' into next

* fix/general:
  fix, PEBKAC, for non-mremap() case in resz_gbs() actually munmap() the old array