don't try to pickle a SubFS of a TempFS, seems to give errors in __del__
don't try to pickle a SubFS of a TempFS, seems to give errors in __del__


git-svn-id: 8cb283e029ccc584ee033bc60e9dde2ebb13e534@171 67cdc799-7952-0410-af00-57a81ceafa0f

pombreda/pyfilesystem-4