relax SVN archive

This problem was reported by Jack Howarth (https://gna.org/users/jhowarth) in the post at
https://mail.gna.org/public/relax-users/2008-10/msg00089.html (Message-id:
<20081024141150.GA879@...>).

The problem was with the position array comparison as this was being converted to a string and then
compared. The string representations of the numpy arrays is obviously different on the intel vs.
powerpc chips.