Cannot delete a user block using Postgresql

I have postgresql (psql) and cannot delete a block that I create manually. This is because delta is a varchar yet use with numbers and thus whoever wrote the code did not put the quotes necessary for Postgresql.

In the following code, you need to quote the %d variable on the 2nd line as shown:

[...snip...]
/**
 * Deletion of custom blocks.
 */
function block_box_delete_submit($form, &$form_state) {
  db_query('DELETE FROM {boxes} WHERE bid = %d', $form_state['values']['bid']);
  db_query("DELETE FROM {blocks} WHERE module = 'block' AND delta = '%d'", $form_state['values']['bid']);
  drupal_set_message(t('The block %name has been removed.', array('%name' => $form_state['values']['info'])));
  cache_clear_all();
  $form_state['redirect'] = 'admin/build/block';
  return;
}
[...snip...]

The code snippet is from /modules/block/block.admin.inc, the bug is on line 336.

Thank you.
Alexis Wilke