From f1d4d574065e8489c53e81cdae95cf0c4ce3b495 Mon Sep 17 00:00:00 2001
From: Matthew Wild <mwild1@gmail.com>
Date: Thu, 28 Aug 2014 09:20:33 +0100
Subject: util.filters: Ignore filters being added twice (fixes issues on
 removal)

---
 util/filters.lua | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'util/filters.lua')

diff --git a/util/filters.lua b/util/filters.lua
index d24bd33e..6290e53b 100644
--- a/util/filters.lua
+++ b/util/filters.lua
@@ -45,6 +45,8 @@ function add_filter(session, type, callback, priority)
 	if not filter_list then
 		filter_list = {};
 		session.filters[type] = filter_list;
+	elseif filter_list[callback] then
+		return; -- Filter already added
 	end
 	
 	priority = priority or 0;
-- 
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