semaphore table need to be created during update_fix_d6_requirements() (again!)

This is a bug that was recently fixed in update.php:
http://drupal.org/node/767408
with an accepted patch: http://drupal.org/files/issues/fix-semaphore-upgrade-errors.patch

However, the bug still persists in drush updatedb.

The same patch needs to be applied to drush/commands/core/drupal/update_6.inc, otherwise a number of errors occur when upgrading from 5.x using drush updatedb the first time on a fresh D6.16+ install.

Attached is a tested patch that fixes the issue for me (sorry - not from CVS, so probably won't apply cleanly).
Patch simply adds following code to the end of function update_fix_d6_requirements()

    // Create the semaphore table now -- the menu system after 6.15 depends on
    // this table, and menu code runs in updates prior to the table being
    // created in its original update function, system_update_6054().
    $schema['semaphore'] = array(
      'fields' => array(
        'name' => array(
          'type' => 'varchar',
          'length' => 255,
          'not null' => TRUE,
          'default' => ''),
        'value' => array(
          'type' => 'varchar',
          'length' => 255,
          'not null' => TRUE,
          'default' => ''),
        'expire' => array(
          'type' => 'float',
          'size' => 'big',
          'not null' => TRUE),
        ),
      'indexes' => array('expire' => array('expire')),
      'primary key' => array('name'),
    );
    db_create_table($ret, 'semaphore', $schema['semaphore']);