repository/Maildir.py: Fix typo 'sudir'
repository/Maildir.py: Fix typo 'sudir'

sudir->subdir in a debug statement. Thanks ccxCZ on IRC for the heads
up.

Signed-off-by: Sebastian Spaeth <98dcb2717ddae152d5b359c6ea97e4fe34a29d4c@SSpaeth.de>
Signed-off-by: Nicolas Sebrecht <347709267ddd1958560c4c317ea3fd613f10a719@laposte.net>

frioux/offlineimap,frioux/offlineimap