It is not sufficient to collect the cells, one has to broadcast on the
collection.

Change-Id: I11f889936aff43f958c56789e539809289819752
(cherry picked from commit 97ad6393)
Reviewed-on: https://gerrit.libreoffice.org/18573Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tor Lillqvist <tml@collabora.com>