[MERGE] Fix for walkdirs in missing dir with Py2.4 @ win32

[John Arbash Meinel]

John Arbash Meinel has voted +1.
Status is now: Approved
Comment:
Seems reasonable. I wonder if we want to add a standard place for any of 
these windows errors that we are defining.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C4624BE13.8070104%40ukr.net%3E