Fix issue 2076 - fsfs does not check if the revision is valid for proplist/                  propedit/etc
Fix issue 2076 - fsfs does not check if the revision is valid for proplist/
                 propedit/etc

* subversion/libsvn_fs_fs/fs_fs.c
  (svn_fs_fs__set_revision_proplist, svn_fs_fs__revision_proplist):
  Return SVN_ERR_FS_NO_SUCH_REVISION if the revprop file does not exist.

  (svn_fs_fs__write_revision_zero): Create an empty revprop file for
  revision zero.

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