after
    commit 50c63e5c
    pass OutlinerParaObject around by std::unique_ptr

spotted by Mike Kaganski

Change-Id: Id69aafc8b0a0fb06165e3fc0cc6e6a29108b4d1f
Reviewed-on: https://gerrit.libreoffice.org/62540
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>