fix no media also on simple and simple_white

templates/flyers/simple.html

@@ -30,7 +30,7 @@
     {% for event in events %}
       <div class="event">
        <div class="center flyer-container">
-        <img class="flyer" src="https://balotta.org/media/thumb/{{event.media[0].url}}" style="object-position: {{ event.media[0].thumbnailPosition }}"></img>
+         <img class="flyer" src="https://balotta.org/{{"media/thumb/" + event.media[0].url if event.media else "fallbackimage.png"}}" style="object-position: {{ event.media[0].thumbnailPosition if event.media else "50%"}}"></img>        
        </div>
        <div class="event_info">
         <h3 class="title">{{ event.title }}</h3>

templates/flyers/simple_white.html

@@ -28,7 +28,7 @@
     {% for event in events %}
       <div class="event">
        <div class="center flyer-container">
-        <img class="flyer" src="https://balotta.org/media/thumb/{{event.media[0].url}}" style="object-position: {{ event.media[0].thumbnailPosition }}"></img>
+         <img class="flyer" src="https://balotta.org/{{"media/thumb/" + event.media[0].url if event.media else "fallbackimage.png"}}" style="object-position: {{ event.media[0].thumbnailPosition if event.media else "50%"}}"></img>
        </div>
        <div class="event_info">
         <h3 class="title">{{ event.title }}</h3>