Since we now have three, not two anchor types.

Change-Id: I9654de574a9d546d2191093cba9c192fac3cd3d7
Reviewed-on: https://gerrit.libreoffice.org/50987Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Maxim Monastirsky <momonasmon@gmail.com>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>