Make sure we don't forget about an error.
Make sure we don't forget about an error.

* subversion/libsvn_ra_serf/util.c:
  (expat_response_handler): combine any potential INNER_ERROR into the
    error we construct when we hit a parsing error

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