Fix replies tab pagination issue

Problem:
Before / After links in replies tab don't work. When clicked they show "No such user" error.
How to reproduce:
1. Access http://identi.ca/evan/replies
2. Click on Before button

darcs-hash:20081001010741-352e0-4cbf4afc0f12aa850c1cc7145324477157f24d98.gz

actions/replies.php

@@ -96,6 +96,6 @@ class RepliesAction extends StreamAction {
 		}
 
 		common_pagination($page > 1, $cnt > NOTICES_PER_PAGE,
-						  $page, 'replies', array('nickname' => $profile->nickname));
+						  $page, 'replies', array('nickname' => $user->nickname));
 	}
 }