Fix a memory access bug identified by Travis P <svn@castle.fastmail.fm>.
Fix a memory access bug identified by Travis P <svn@castle.fastmail.fm>.

Suggested by: Travis P <svn@castle.fastmail.fm>

* subversion/libsvn_subr/subst.c (svn_subst_translate_stream): Fix an
  off-by-one thinko in the buf handling.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@848375 13f79535-47bb-0310-9956-ffa450edef68

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