Bugfix for Countdown

- error when for the next event no displaytime was available
- better display when no time or location for the next event is known

website/templates/website/event_countdown.html

@@ -39,8 +39,8 @@
             <h4>Der nächste Termin:</h4>
             <p>
                 {{countdown.event.title}}  am  {{countdown.event.date | date:"D, d.m.y" }} 
-                um {{countdown.event.displaytime | time:"H:i" }}  Uhr 
-                in <em>{{countdown.event.location}} </em>
+                {% if coundown.event.displaytime %} um {{countdown.event.displaytime | time:"H:i" }}  Uhr  {% endif %}
+                {% if coundown.event.location %} in <em>{{countdown.event.location}} </em> {% endif %}
                 
                 <br/>
                 {% if 'participation' in countdown %}