User Location broken - not setting "location_setting_user"

This test is failing in location_form(...) :

/**
 * Get form elements for editing locations on an object.
 */
function location_form($settings, $locations) {

 if (!isset($settings['multiple']['max']) || $settings['multiple']['max'] == 0) {
    // Location not enabled for this object type.
    // Bail out early.
    return array();
  }

when being called from location_user_user(...)

    case 'form':
      if ($category == 'account') {
        if ((($user->uid == $account->uid) && user_access('set own user location')) || user_access('administer user locations')) {
          $settings = variable_get('location_settings_user', array());
          $form['locations'] = location_form($settings, $account->locations);
          return $form;
        }
      }
      break;

because the variable "location_settings_user" isn't set, hence variable_get returns an empty array().