* subversion/libsvn_client/externals.c
  (switch_file_external): Apply some assumptions that have been valid since
    1.7. Use passed pool as scratch. Remove lock release as the code where
    we obtain it was turned into an error in 1.7.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1434667 13f79535-47bb-0310-9956-ffa450edef68