Passing FastAttributeIter to the method makes the
code much cleaner and easy to read.

Change-Id: I227e9dc378dfba51168c29452667576a779dc215
Reviewed-on: https://gerrit.libreoffice.org/39730Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>