Fix basic_tests 28 failure.
Fix basic_tests 28 failure.

* subversion/libsvn_ra_dav/util.c
  (end_err_element): Promote after all of the error response has been read.

Found by: djh
          lgo

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