Be consistent in the way we create file / stream data buffers.
Be consistent in the way we create file / stream data buffers.

* subversion/libsvn_fs_fs/transaction.c
  (fnv1a_checksum_on_file_range): Allocate the data buffer from the
                                  APR pool instead of from stack.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1588899 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion