regression from

commit f17a4694
Author: Arnaud Versini <arnaud.versini@gmail.com>
Date:   Sat Feb 13 20:17:41 2016 +0100

    BASIC : use std::unique_ptr for storing SbiExprList

    Change-Id: I37f2a1c837c6742cf6d403962d2730b5e80004ec
    Reviewed-on: https://gerrit.libreoffice.org/22345

because they have been moved into the container at this
point

Change-Id: If21e0321ffdce66aa9629637d0ff8c16efbbd25e