deleting rule leading to query error message & db

Issue Summary

When deleting a rule in admin "By Path" tab
/admin/content/nodewords/path

It always throws an error like:
user warning: Unknown column 'id' in 'where clause' query: DELETE FROM nodewords_bypath_tags WHERE id = 1 in /home/sites/lz/web/includes/database.mysql.inc on line 172.

This is due to nodewords_bypath.forms.inc @235
db_query('DELETE FROM {nodewords_bypath_tags} WHERE id = %d', $id);

which should be path_id instead of id.

thus leading to nodewords_bypath_tags to contain orphans.