I started with 32 and kept doubling the size until the site
did not need re-alloc, but clamped it at 512 (e.g. in emfio/).
Change-Id: Ib7caf35a1b7e42b0e4ed8aa812493449e3eefc8f
Reviewed-on: https://gerrit.libreoffice.org/81540
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>