ra_serf: Do not try to fetch text deltas if we aren't asked for them by our reporter.
ra_serf: Do not try to fetch text deltas if we aren't asked for them by our
reporter.

Pass stat test #15 (status -u in partially non-recursive wc)

* subversion/libsvn_ra_serf/update.c
  (fetch_file): Only fetch the file when text deltas are requested.

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