which is a new header file introduced in calc formulagroup threading
work.

Change-Id: I8203ce392b36581f64457edb52449df3e84fb216
Reviewed-on: https://gerrit.libreoffice.org/45080Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>