To be able to later differentiate specific types in the compiler.

Change-Id: If97485c0cb8e8e2e129c61cd3f01d9d420c92c8d
Reviewed-on: https://gerrit.libreoffice.org/37439Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>