Fix a buglet in 'svn mergeinfo'.
Fix a buglet in 'svn mergeinfo'.

* subversion/svn/mergeinfo-cmd.c
  (svn_cl__mergeinfo): Don't bail just because the target has no mergeinfo;
    if --from-source was used, there might be more work still to do.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion