bug#5343: 23.1.91; recursive directory copying is broken

1. emacs -Q
2. Make a directory /tmp/test, add to it a file named "a" and a
   directory named "test", and add to /tmp/test/test a file named "b".
3. Type `M-x copy-directory RET /tmp/test RET ~ RET' to copy /tmp/test
   recursively to ~.
4. Type `C-x d' and at the prompt `~' to visit ~ in Dired, put the
   cursor on the directory "test" and type `i' to open "test" as a
   subdirectory.  This is the result:

  /home/steve/test:
  total used in directory 16 available 7794948
  -rw-r--r--  1 steve users    4 2010-01-08 23:57 a
  -rw-r--r--  1 steve users    7 2010-01-08 23:57 b

Using `C' in Dired gives the same broken result.  In Emacs 23.1
recursive directory copying by `C' in Dired (copy-directory does not
exist in 23.1) works correctly, i.e., shows this:

  /home/steve/test:
  total used in directory 16 available 7794944
  -rw-r--r--  1 steve users    4 2010-01-08 23:31 a
  drwxr-xr-x  2 steve users 4096 2010-01-09 00:06 test

  /home/steve/test/test:
  total used in directory 12 available 7794944
  -rw-r--r-- 1 steve users    7 2010-01-08 23:32 b


In GNU Emacs 23.1.91.1 (i686-pc-linux-gnu, GTK+ Version 2.18.1)
 of 2010-01-06 on escher
Windowing system distributor `The X.Org Foundation', version 11.0.10605000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=local
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t