Empty field items causes product reference formatter to load ALL products

If the field items array is empty, then the formatter code below will load all products with status=1.... a warning to anyone using commerce_product_load_multiple() with a filter array.

commerce_product_reference_field_formatter_view():

392  // Collect the list of product IDs.
393  $product_ids = array();
394
395  foreach ($items as $delta => $item) {
396    $product_ids[$item['product_id']] = $item['product_id'];
397  }
398
399  $products = commerce_product_load_multiple($product_ids, array('status' => 1));