Fix memory leaks in ensure_dbus_setup.
Fix memory leaks in ensure_dbus_setup.

g_menu_append_item and g_menu_append_section don't reference their
argument but copy the argument. So explicitly g_object_unref the
arguments afterwards.

Change-Id: I14f18d7571351a2eec99dc557b59e69b766fbde8
Reviewed-on: https://gerrit.libreoffice.org/5269
Reviewed-by: Caolán McNamara <301f5784f9f6aac04077f24f1e5abc31af69d401@redhat.com>
Tested-by: Caolán McNamara <301f5784f9f6aac04077f24f1e5abc31af69d401@redhat.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core