From e3fd2037fc259390a431bf80521f8c7ac1976885 Mon Sep 17 00:00:00 2001
From: Matthew Wild <mwild1@gmail.com>
Date: Thu, 22 Mar 2018 16:26:09 +0000
Subject: util.async: Allow nil as a guard key

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

(limited to 'util')

diff --git a/util/async.lua b/util/async.lua
index 7a8bd686..e8469e51 100644
--- a/util/async.lua
+++ b/util/async.lua
@@ -84,7 +84,9 @@ end
 
 local function guarder()
 	local guards = {};
+	local default_id = {};
 	return function (id, func)
+		id = id or default_id;
 		local thread = checkthread();
 		local guard = guards[id];
 		if not guard then
-- 
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