This avoids finding emboleobj's component in such case.

Change-Id: Ie1bdef629a55b4ddb6be2538939867c182c184b3
Reviewed-on: https://gerrit.libreoffice.org/21075Reviewed-by: Matúš Kukan <matus@libreoffice.org>
Tested-by: Matúš Kukan <matus@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>