Fix compilation error with old serf.
Fix compilation error with old serf.

* subversion/libsvn_ra_serf/propfind_buckets.c
  (): Include private/svn_dep_compat.h


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@868100 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion