[BirdOPrey5]

Just put a conditional in your plugin, if $user_ava[0] is empty, put a URL in for an image showing "no avatar" or whatever default image you want:

PHP Code:

require_once('./includes/functions_user.php');
   $user_ava = fetch_avatar_url($vbulletin->userinfo['userid']);

if ($user_ava[0] == "")
  $user_ava[0] = "http://www.yourdomain.com/images/noavatar.gif";