On the fsfs-ucsnorm branch: Temporarily revert changes in lookup processing.

* subversion/libsvn_fs_fs/tree.c: Revert to trunk version.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-ucsnorm@1562037 13f79535-47bb-0310-9956-ffa450edef68