only show forum ban button if player has a user

standardweb/templates/player.html

@@ -26,7 +26,7 @@
             <div class="section-header">
                 <div class="pull-right align-right">
                     {% if current_user and player.user != current_user %}
-                        {% if current_user.admin_or_moderator %}
+                        {% if current_user.admin_or_moderator and player.user %}
                             {% if player.user.forum_ban %}
                                 Forum banned
                             {% else %}