I removed the fprintf statements and replaced them with
SAL_WARN statements.

Change-Id: Id75e310e3a95b249fdf92a4dd5a9bcf1b7fb9be6
Reviewed-on: https://gerrit.libreoffice.org/22984Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: jan iversen <jani@documentfoundation.org>