... should only be emitted when the text attributes have changed [a11y]
second attempt.

This appears to have begin at

    commit 7d9bb549
    Date:   Mon Jun 2 15:00:50 2014 +0000
    Related: #i124638# Second step of DrawingLayer FillAttributes...

Which accidentally removed the aWhichSublist param from the SwUpdateAttr
constructor in SwpHints::TryInsertHint.

Change-Id: If435ea71e8d84e0d8497cd7106cfdbebcc6af7a0
Reviewed-on: https://gerrit.libreoffice.org/66719
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>