From f2e4a6665b257fbcdfd3d7fef0f00a28590738c8 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Wed, 13 May 2009 18:50:12 +0000
Subject: [PATCH] libs/sys: fix checking for empty table

---
 libs/sys/luasrc/sys.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/sys/luasrc/sys.lua b/libs/sys/luasrc/sys.lua
index d6062482c6..ad80ae5ba3 100644
--- a/libs/sys/luasrc/sys.lua
+++ b/libs/sys/luasrc/sys.lua
@@ -701,7 +701,7 @@ function wifi.channels(iface)
 		fd:close()
 	end
 
-	if #cns == 0 then
+	if not ((pairs(cns))(cns)) then
 		cns = {
 			2.412, 2.417, 2.422, 2.427, 2.432, 2.437,
 			2.442, 2.447, 2.452, 2.457, 2.462
-- 
2.30.2