fix dupe event listeners on category

only happens if you navigate from category to category

public/src/client/category.js

@@ -28,6 +28,7 @@ define('forum/category', ['composer', 'forum/pagination', 'forum/infinitescroll'
 			composer.newTopic(cid);
 		});
 
+		socket.removeListener('event:new_topic', Category.onNewTopic);
 		socket.on('event:new_topic', Category.onNewTopic);
 
 		categoryTools.init(cid);

public/src/client/categoryTools.js

@@ -72,7 +72,7 @@ define('forum/categoryTools', ['forum/topic/move', 'topicSelect'], function(move
 			});
 		});
 
-
+		CategoryTools.removeListeners();
 		socket.on('event:topic_deleted', setDeleteState);
 		socket.on('event:topic_restored', setDeleteState);
 		socket.on('event:topic_purged', onTopicPurged);