[fix] 404 on already confirmed

bt/views.py

@@ -97,8 +97,10 @@ def confirm(request, id, name=None):
                 return HttpResponse(unicode(_("Thank you, this has been already confirmed")))
             c.save()
         return HttpResponse('<div class="confirm_thanks">%s</div>' % unicode(_('Thank you for your confirmation')) )
-    c=Confirmation.objects.get(key=id)
-    if c:
+    try:
+        c = get_object_or_404(Confirmation, key=id)
+    except:
+        return HttpResponse(unicode(_("Thank you, this has been already confirmed")))
     c.key=''
     c.save()
     messages.add_message(request, messages.INFO, unicode(_('Thank you for verifying your confirmation')))