the first attempt (d4a8d91a)
incorrectly changed the type of a UNO property defined in a
published IDL file.

Change-Id: I75bc75dead0954d1faa6dfb6adab9f4c42c67cfc
Reviewed-on: https://gerrit.libreoffice.org/50827Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>