[PATCH v2] new: Don't scan unchanged directories with no sub-directories

[Vladimir Marek]

> > This can substantially reduce the cost of notmuch new in some
> > situations, such as when the file system cache is cold or when the
> > Maildir is on NFS.
> > ---
> 
> pushed as commit 516efb7807

Muchas gracias!
-- 
	Vlad