Simplify FSFS locking code a bit.

* subversion/libsvn_fs_fs/transaction.c
  (verify_locks): Use svn_sort__hash() for sorting hash of changed paths.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1646021 13f79535-47bb-0310-9956-ffa450edef68