Fix bug where sending a PM would display as sent to the wrong person.

In get_display_recipient, the userprofile was selected incorrectly by
user_id instead of the userprofile_id. In production, this hasn't
resulted in a user-visible error because we use MySQL and user ids are
always equal to userprofile ids.

This does happen if you are using SQLite locally and run populate_db,
which adds a bunch of users in parallel in an insufficiently
transactional way.

(imported from commit c25a04b4919e3efdfc6996b03492f7714d9034e8)

zephyr/models.py

@@ -42,7 +42,7 @@ def get_display_recipient(recipient):
                  'full_name': user_profile.full_name,
                  'short_name': user_profile.short_name} for user_profile in user_profile_list]
     else:
-        user_profile = UserProfile.objects.select_related().get(user=recipient.type_id)
+        user_profile = UserProfile.objects.select_related().get(id=recipient.type_id)
         return {'email': user_profile.user.email,
                 'full_name': user_profile.full_name,
                 'short_name': user_profile.short_name}