* lisp/vc/vc.el (vc-rename-file): Replace broken attempted use
of vc-dir-status-files with walking OLD using vc-file-tree-walk.
* test/lisp/vc/vc-tests/vc-tests.el (vc-test--rename-directory):
Assert that the files are registered or not as appropriate. New
test case in which there are only registered files.