now that those functions are entirely malloc/free based, we can skip a
function call layer.

Change-Id: Ib091de0bdf4cdd58cee45185df17d96d3e8af402
Reviewed-on: https://gerrit.libreoffice.org/59576
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>