System error when requesting fix in a distribution without specifying a source package

[Björn Tillenius]

If you request a fix in a distribution, and don't specify a source package, you get a system error.

[Gabriel Neuman (gabrielneuman)]

    * Module canonical.launchpad.mailnotification, line 645, in notify_bugtask_added
      subject, body = generate_bug_edit_email(bug_delta)
    * Module canonical.launchpad.mailnotification, line 316, in generate_bug_edit_email
      body += u"Also affects: %s (%s)\n" % (

AttributeError: 'NoneType' object has no attribute 'name'