Only replaced "iff" with "if"

Change-Id: Ib9dfa5c12b05500043147fe3b65f923b1b12a581
Reviewed-on: https://gerrit.libreoffice.org/37782Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>