fdo#40694 - Error in message when truncating col/row numbers in calc

It looks like while older version (3.5.x) gives a wrong warning
The newer version doesn't give any warnings.
With this it gives the warning with correct message.

Change-Id: Iad3eac92527ac6acbc534fe77d8d39e5b242ca93
Reviewed-on: https://gerrit.libreoffice.org/7618
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>