[MERGE] Fast _walkdirs for win32

[Robert Collins]

Robert Collins has voted tweak.
Status is now: Conditionally approved
Comment:
+# Copyright (C) 2007 Canonical Ltd

Time machine much?

This hunk in osutils seems to be redundant?
@@ -1271,6 +1278,15 @@
          pending.extend(d for d in reversed(dirblock) if d[2] == 
_directory)


+def _walkdirs_utf8_win32_find_file(top, prefix=""):
+    """
+    Because Win32 has a Unicode api, all of the 'path-from-top' entries 
will be
+    Unicode paths.
+    """
+    from bzrlib._walkdirs_win32 import Win32Finder
+    return Win32Finder(top, prefix=prefix)
+
+

otherwise cool

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C487ECFA1.4050205%40arbash-meinel.com%3E