Use svn_stream_open*() instead of svn_io_file_open() if we only use the file as a stream while blaming.
Use svn_stream_open*() instead of svn_io_file_open() if we only use the
file as a stream while blaming.

* subversion/libsvn_client/blame.c
  (delta_baton): Store streams instead of files.
  (window_handler): Close streams instead of files.
  (file_rev_handler): Open as stream instead of as file, followed
    by wrapping as stream.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@933975 13f79535-47bb-0310-9956-ffa450edef68

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