Found by the "Random Condig" tb run #293.

Change-Id: I8fa7b66444b9b57f289c963cb1da5e772341dc30
Reviewed-on: https://gerrit.libreoffice.org/35156Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>