A bit of refactoring in FSFS, no functional change.
A bit of refactoring in FSFS, no functional change.

* subversion/libsvn_fs_fs/fs_fs.c
  (is_packed_rev): Abstract out a bit of magic for determining if a rev is
    packed or not.  This is a function and not a macro to make it easier
    to grow, should we need more complex logic later.
  (open_pack_or_rev_file, open_and_seek_revision, get_root_changes_offset,
   get_root_changes_offset, svn_fs_fs__set_revision_proplist): Use the
    new helper function.

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