Make 'svnmover' return a friendly error message instead of failing an assertion when no move-tracking metadata is found in the repository.
Make 'svnmover' return a friendly error message instead of failing an assertion
when no move-tracking metadata is found in the repository.

* tools/dev/svnmover/ra.c
  (branch_revision_fetch_info): Return a friendly error message when
    no move-tracking metadata is found.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1714776 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion