Inconstant use of queue length

When you make a block queue you can enter 0 (zero) for the maximum number of blocks.

When displaying the queues (admin/build/blockqueue) these displays as infinite (consistent with other Drupal interfaces)

But when you go to add a block, you get the error "No additional blocks are allowed in this queue."

I think in blockqueue_view_queue_submit() this line

    if (count($form_state['values']['blocks']) >= $form['#max_size']) {

should be

    if ($form['#max_size']  &&  (count($form_state['values']['blocks']) >= $form['#max_size'])) {