Fix a problem with reverse order 'log -g' output.
Fix a problem with reverse order 'log -g' output.

* subversion/libsvn_repos/log.c
  (do_merged_logs):  Instead of breaking on an out-of-range revision, just
    continue, because there may be more in-range revisions later.

Found by: markphip

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