Avoid errors when displaying game overview with zero sessions

games/templates/view_game.html

@@ -62,6 +62,7 @@
         <h1 class="text-3xl mt-4 mb-1 flex gap-2 items-center">
             Sessions
             <span class="dark:text-slate-500" id="session-count">({{ session_count }})</span>
+{% if latest_session_id %}
             {% url 'view_game_start_session_from_session' latest_session_id as add_session_link %}
             <a
                 class="truncate max-w-xs py-1 px-2 text-xs bg-green-600 hover:bg-green-700 focus:ring-green-500 focus:ring-offset-blue-200 text-white transition ease-in duration-200 text-center font-semibold shadow-md focus:outline-none focus:ring-2 focus:ring-offset-2 rounded-sm"
@@ -72,6 +73,7 @@
                 hx-target="#session-list"
                 hx-swap="afterbegin"
             >New</a>
+{% endif %}
             and Notes <span class="dark:text-slate-500">({{ sessions_with_notes_count }})</span>
         </h1>
         <ul id="session-list">