Fix a compiler warning.
Fix a compiler warning.

* subversion/libsvn_ra_serf/util.c:
  (svn_ra_serf__request_create): change assertion to NO_RETURN.

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