django 1.6 force send default

django 1.6 no longer defaults to False for BooleanFields which causes
startup warnings.
https://docs.djangoproject.com/en/dev/releases/1.6/#booleanfield-no-longer-defaults-to-false.
this commit forces False on the send field.

notification/models.py

@@ -88,7 +88,7 @@ class NoticeSetting(models.Model):
     user = models.ForeignKey(AUTH_USER_MODEL, verbose_name=_("user"))
     notice_type = models.ForeignKey(NoticeType, verbose_name=_("notice type"))
     medium = models.CharField(_("medium"), max_length=1, choices=NOTICE_MEDIA)
-    send = models.BooleanField(_("send"))
+    send = models.BooleanField(_("send"), default=False)
 
     class Meta:
         verbose_name = _("notice setting")