From: Jo-Philipp Wich <jow@openwrt.org>
Date: Wed, 13 May 2009 18:50:12 +0000 (+0000)
Subject: libs/sys: fix checking for empty table
X-Git-Tag: 0.9.0~456
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=f2e4a6665b257fbcdfd3d7fef0f00a28590738c8;p=oweals%2Fluci.git

libs/sys: fix checking for empty table
---

diff --git a/libs/sys/luasrc/sys.lua b/libs/sys/luasrc/sys.lua
index d6062482c..ad80ae5ba 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