Put back a seek(0) command accidentally removed in previous commit. Fixed mixed-up order of pickle loading error message.
Put back a seek(0) command accidentally removed in previous commit. Fixed mixed-up order of pickle loading error message.

git-svn-id: 1090b387d452580804210ae271d3c35ba515bde4@11535 0ce056cd-c842-0410-9ff1-d0633a95805a

jesuscript/topo-mpi,jesuscript/topo-mpi,jesuscript/topo-mpi,jesuscript/topo-mpi,jesuscript/topo-mpi