Unhandled foreach Error

On line 1503 there is a foreach() within the user_view function which is erroring if that array is empty, so i have wrapped this in an if statement to avoid any unnecessary errors.

function user_view($uid = 0) {
  global $user;

  $account = user_load(array('uid' => $uid));
  if ($account === FALSE || ($account->access == 0 && !user_access('administer users'))) {
    return drupal_not_found();
  }
  // Retrieve and merge all profile fields:
  $fields = array();
  foreach (module_list() as $module) {
    if ($data = module_invoke($module, 'user', 'view', '', $account)) {
      if ( is_array($data) ) {
          foreach ($data as $category => $items) {
            foreach ($items as $key => $item) {
              $item['class'] = "$module-". $item['class'];
              $fields[$category][$key] = $item;
            }
        }
      }
    }
  }

  // Let modules change the returned fields - useful for personal privacy
  // controls. Since modules communicate changes by reference, we cannot use
  // module_invoke_all().
  foreach (module_implements('profile_alter') as $module) {
    $function = $module .'_profile_alter';
    $function($account, $fields);
  }

  drupal_set_title($account->name);
  return theme('user_profile', $account, $fields);
}