A stupid typo was preventing this from ever working and it was not
detected until now. Patrick noted the typo and proposed the fix in mail
id:"
20110704203926.GA20238@brick.lan".
Patch-by: Patrick Totzke <patricktotzke@googlemail.com>
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
 
         # Raise a NotmuchError if not initialized
         self._verify_initialized_db()
 
-        return notmuch_database_needs_upgrade(self._db) 
+        return nmlib.notmuch_database_needs_upgrade(self._db) 
 
     def upgrade(self):
         """Upgrades the current database