PHP Warning when creating users with no profile categories set up

I enabled the i18n and i18nprofile modules on a fresh drupal 5.1 install. I have no profile categories set up. So when creating a new user I receive the following warning:

warning: Invalid argument supplied for foreach() in /drupal-5.1/sites/default/modules/i18n/i18nprofile/i18nprofile.module on line 173

Fixed this problem by checking the return value of the profile_categories() function with the is_array() function. See the attached patch file