Fix a bug in repository check.
Fix a bug in repository check.

* tools/server-side/svn-backup-dumps.py:
  (SvnBackup.__init__): Use subdir instead of constant string "db".

Patch by: Mark Stead <mark@stead.id.au>

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