aHdl is an SdrHdlList, so reading aHdl.GetHdl() as "get the handle of the
handle" was confusing.

Change-Id: Ib21fa74cc1daa4b6d2034f07715147a8fb0cf934
Reviewed-on: https://gerrit.libreoffice.org/14779Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>