Updating to DB Version 11 fails (sqlite)

[Weishaupt]

Hey there,
I'm a long time user of selfoss.
Updating to the latest master fails with this error (obviously, I'm using sqlite)

$ php cliupdate.php 
PDOStatement: NOT NULL constraint failed: new_items.updatetime
[daos/sqlite/Database.php:201] DB\SQL->exec()
[daos/Database.php:25] daos\sqlite\Database->__construct()
[daos/Items.php:25] daos\Database->__construct()
[helpers/ContentLoader.php:23] daos\Items->__construct()
[cliupdate.php:6] helpers\ContentLoader->__construct()
an error occured

The problem seem to be some very old entries in my db

sqlite> select count(*) from items
  ...> where updatetime is null;
60

sqlite> select id, datetime from items
   ...> where updatetime is null;
133|2013-03-20 08:30:57
425|2013-03-22 11:20:25
1091|2013-03-27 09:56:46
2026|2013-04-02 14:40:00

I personally fixed it, altering the data in the sqlite table. But I'd suggest altering the update routine.

sqlite> update items set updatetime = datetime
   ...> where updatetime is null;