Fix issue #1721:  "bogus REPORT response when updating a deleted WC"
Fix issue #1721:  "bogus REPORT response when updating a deleted WC"

This patch (made w/cmpilato) fixes the immediate problem, but doesn't
fix a potentially deeper bug in apache.  See the issue for upcoming details.

* mod_dav_svn/update.c (dav_svn__update_report): if we're in the
  process of throwing an error, do *not* flush the brigade.

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