Missing sequence localizertranslation_tid_seq

Using the latest CVS checkout, I tried to create a category and I'm presented the following error message:

# warning: pg_query(): Query failed: FEHLER: Relation »localizertranslation_tid_seq« existiert nicht in /srv/www/htdocs/drupal-5.5/includes/database.pgsql.inc on line 125.

# user warning: query: SELECT nextval('localizertranslation_tid_seq') in /srv/www/htdocs/drupal-5.5/includes/database.pgsql.inc on line 144.

The attached fix cures that problem.

Please note that this issue has been discussed already:
http://drupal.org/node/155194

However, as far as I can remember, this issue never has been addressed in the 5.x-1.x version. Therefore this patch should be backported to that branch, too.