Should never be produced in practice. SHA1 may still be used when loading existing document. Signed-off-by: Michael Stahl <michael.stahl@collabora.com> Change-Id: Id14c10186a8fae270e75b6cc1cda191dabd9392c Reviewed-on: https://gerrit.collaboraoffice.com/c/online/+/5166 Reviewed-by: Stephan Bergmann <stephan.bergmann@collabora.com> (cherry picked from commit de8c258fac0c878cbb52b9bf819e16ea16e0b484) Reviewed-on: https://gerrit.libreoffice.org/c/core/+/207315 Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org> Tested-by: Jenkins