ignore jingles with unknown duration

diff --git a/nonstop/models.py b/nonstop/models.py
index e29f57146c254c4c5e89627d2ef9bb5c3b5ac478..139d27062b187c916a7fbbd6d2084f77c1e3ab23 100644 (file)
--- a/nonstop/models.py
+++ b/nonstop/models.py
@@ -223,7 +223,7 @@ class ScheduledDiffusion(models.Model):
         if self.is_stream():
             return self.diffusion.end_datetime
         dt = self.diffusion.datetime
-        if self.jingle:
+        if self.jingle and self.jingle.duration:
             dt += self.jingle.duration
         dt += datetime.timedelta(seconds=self.soundfile.duration)
         return dt