syntax error at or near ")" at character 68 in database.pgsql.inc on line 84.

I installed the latest cvs this morning from scratch, and when I activated the modules I got this error:

warning: pg_query(): Query failed: ERROR: syntax error at or near ")" at character 68 in database.pgsql.inc on line 84.

This is the query identified by the error message:

ALTER TABLE drupal_ext.term_data ALTER COLUMN language SET NOT NULL)

The error is caused by the extraneous ")" at the end, for which there is no opening parenthesis. This statement is on line 45 of the i18n.install file:

db_query("ALTER TABLE {term_data} ALTER COLUMN language SET NOT NULL)");