dont die for 0 images on meetings

itf/festival/models.py

@@ -50,8 +50,11 @@ class Meeting(ItfModel):
     return self.preview_dict()
 
   def main_image(self):
+    if Image.objects.filter(meeting=self).count() > 0:
         img = Image.objects.filter(meeting=self)[0]
         return img.file
+    else:
+        return None
 
   def info_dict(self):
     meeting_data = {}