Do not assume we always have a stream

 - Legacy-Id: 3854

Author: OleLaursen

redesign/doc/proxy.py

@@ -694,7 +694,8 @@ def has_errata(self):
     #stream = models.CharField(max_length=15,blank=True,null=True)
     @property
     def stream(self):
-        return super(InternetDraft, self).stream.name
+        s = super(InternetDraft, self).stream
+        return s.name if s else None
 
     #wg = models.CharField(max_length=15,blank=True,null=True)
     @property