those vars get their type from SvStream which uses sal_uInt64

Change-Id: Ia356699bb0f5e9787ae6f02e52e0b00cc2f817b1
Reviewed-on: https://gerrit.libreoffice.org/37547Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>