commerce_line_item_form_alter creates core warning as it loads "false" order

commerce_line_item_form_alter may lead to this core issue: "Warning : array_flip(): Can only flip STRING and INTEGER values! in DrupalDefaultEntityController" (#1803048: Warning : array_flip(): Can only flip STRING and INTEGER values! in DrupalDefaultEntityController) as it doesn't check the value given to commerce_order_load() correctly.

In some cases (in mine for anonymous users loading the page) it provides an array with 1 booelan element instead of the order ID to load:
[0] => false

So I'd suggest further checking the value before providing the parameter. See Mr.

commerce_line_item.module, Line 106 ff.

/**
 * Implements hook_form_alter().
 *
 * Alter the views form with functionality specific to line items.
 * This form currently only supports line items from a single order, and it
 * determines which order the line items are for based on a Views argument.
 */
function commerce_line_item_form_alter(&$form, &$form_state, $form_id) {
  $line_item_form = FALSE;

  // Is this a views form?
  if (strpos($form_id, 'views_form_') === 0) {
    $view = $form_state['build_info']['args'][0];

    // Does the view contain one of the line item edit fields?
    foreach ($view->field as $field_name => $field) {
      if ($field instanceof commerce_line_item_handler_field_edit_delete || $field instanceof commerce_line_item_handler_field_edit_quantity) {
        $line_item_form = TRUE;
      }
    }
  }

  // This is not the form we are looking for.
  if (!$line_item_form) {
    return;
  }

  // Require the existence of an order_id argument (and its value).
  if (empty($view->argument['order_id']) || empty($view->argument['order_id']->value)) {
    return;
  }

  $form['#attached']['css'][] = drupal_get_path('module', 'commerce_line_item') . '/theme/commerce_line_item.theme.css';
  $form['#attached']['js'][] = drupal_get_path('module', 'commerce_line_item') . '/commerce_line_item.js';
  $form['#submit'][] = 'commerce_line_item_line_item_views_form_submit';

  // Wrap the form in a div so we can add CSS and javascript behaviors to it.
  $form['#prefix'] = '<div class="commerce-line-item-views-form">';
  $form['#suffix'] = '</div>';

  // Add an additional class to the actions wrapper.
  $form['actions']['#attributes']['class'][] = 'commerce-line-item-actions';

  // Load the order from the Views argument.
  $order = commerce_order_load($view->argument['order_id']->value[0]);
  $form_state['order'] = $order;
}

[1] => Array
(
[file] => /sites/all/modules/contrib/commerce/modules/order/commerce_order.module
[line] => 782
[function] => entity_load
[args] => Array
(
[0] => commerce_order
[1] => Array
(
[0] => false
)

[2] => Array
(
)

[3] =>
)

)

[2] => Array
(
[file] => /sites/all/modules/contrib/commerce/modules/order/commerce_order.module
[line] => 751
[function] => commerce_order_load_multiple
[args] => Array
(
[0] => Array
(
[0] => false
)

[1] => Array
(
)

)

)

[3] => Array
(
[file] => /sites/all/modules/contrib/commerce/modules/line_item/commerce_line_item.module
[line] => 143
[function] => commerce_order_load
[args] => Array
(
[0] => false
)

)

[4] => Array
(
[file] => /includes/module.inc
[line] => 1171
[function] => commerce_line_item_form_alter
[args] => Array