Follow-up to r1525465: fix copy-n-pasto.

* subversion/libsvn_fs/fs-loader.c
  (svn_fs_paths_changed): read into the correct data structure

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1525468 13f79535-47bb-0310-9956-ffa450edef68