Include lastpage in export

See http://www.limesurvey.org/en/community-services/forums/can-i-do-this-with-limesurvey/99158-spss-output-error#115427
and
http://bugs.limesurvey.org/view.php?id=9398
Why not a "number/integer" ? I don't know SPSS, but it can be only an integer, and i thinkSPSS manage best if it's an integer, no ?