So keeping just nIndex is enough.

Change-Id: I5d3a0e6b4a6ce1305a56cf50e7ff181a098f6412
Reviewed-on: https://gerrit.libreoffice.org/35336Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>