coverity#707971 Uninitialized scalar field

Change-Id: I5c1045253c082a00397cf0f048baee947232c9b1
(cherry picked from commit 4ab06a576313de973ae96787a19215b208737859)
Reviewed-on: https://gerrit.libreoffice.org/8820
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>