The decoded message processing relies on fixed column positions so the
extra character used in message averaging to indicate sync flips must
also be allowed for in other modes. This is done by inserting a space
character.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6681 ab8295b8-cf94-4d9e-aec4-7959e3be5d79