to the variadic variants, in avmedia.

Change-Id: I7fe65771ea5e0d30c7906d0d33acdcbe9e8aa3ff
Reviewed-on: https://gerrit.libreoffice.org/16647Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>