coverity#708388 Uninitialized scalar field

Change-Id: Idaa2ec4863beb6be790022c3c66bc4a72e9bf626
(cherry picked from commit 409ebeb20d1ee4552ac21bd739ae4e25eaeb68d9)
Reviewed-on: https://gerrit.libreoffice.org/8891
Tested-by: David Tardon <dtardon@redhat.com>
Reviewed-by: David Tardon <dtardon@redhat.com>