fix tag display when reaching main post

public/src/client/topic/posts.js

@@ -137,6 +137,7 @@ define('forum/topic/posts', [
 
 		data.title = $('<div></div>').text(ajaxify.data.title).html();
 		data.slug = ajaxify.data.slug;
+		data.tags = ajaxify.data.tags;
 		data.viewcount = ajaxify.data.viewcount;
 
 		$(window).trigger('action:posts.loading', {posts: data.posts, after: after, before: before});