Tweak to pool usage, and use new stream functions.
Tweak to pool usage, and use new stream functions.

Note: thanks to danielsh for a lifetime tweak to the get_pristine_fname
  function, made me look at their usage, and fix accordingly.

* subversion/libsvn_wc/wc_db.c:
  (svn_wc__db_pristine_read, svn_wc__db_pristine_write): the pathname
    should be constructed in the scratch pool. use the new
    svn_stream_open_*() functions to simplify.

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