Update to Ultimate Member Integration Code

I had to make a change to the integration code to deal with deleted users so I decided share what I did since I know integration code will not be a priority. If I deleted a user, their comments would show with a blank author. The current integration code has the following line:

if ($comment->user_id) {

but the problem with that is that all comments that were posted by registered users will have a user_id whether or not the user still exists.

I had to change the code to the following for it to work for deleted users:

if (get_userdata($comment->user_id)) {