- fixed bug in search.php

- fixed bug in discussion.php
- theme update: comment() now takes 3 arguments:
    $comment - an object with comment data
    $link    - a link to the reply form of that particular
               comment
    $thread  - the subthread of that particular comment
- theme 'marvin' and theme 'zaphod' are updated, theme
  'unconed' is left to be done

includes/comment.inc

@@ -0,0 +1,17 @@
+<?
+
+class Comment {
+  function Comment($userid, $subject, $comment, $timestamp, $url, $fake_email, $score, $votes, $cid) {
+    $this->userid = $userid;
+    $this->subject = $subject;
+    $this->comment = $comment;
+    $this->timestamp = $timestamp;
+    $this->url = $url;
+    $this->fake_email = $fake_email;
+    $this->score = $score;
+    $this->votes = $votes;
+    $this->cid = $cid;
+  }
+}
+
+?>