relax SVN archive

svn+ssh://bugman@.../svn/relax/trunk

........
r25197 | bugman | 2014-08-22 11:20:33 +0200 (Fri, 22 Aug 2014) | 7 lines

Fix for bug #22505 (https://gna.org/bugs/?22505).

This is the failure of the structure.create_diff_tensor_pdb user function when no structural data is
present. The solution was simple - the CoM of the representation is set to the origin when no
structural data is present, and the check for the presence of data removed.
........