From 809b4f4ed17eee992149d98641717e2b382ac5af Mon Sep 17 00:00:00 2001
From: Vanessa Ezekowitz <vanessaezekowitz@gmail.com>
Date: Thu, 11 Jun 2015 02:27:12 -0400
Subject: [PATCH] don't crash on empty string

---
 init.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init.lua b/init.lua
index decfabb..bcf5727 100644
--- a/init.lua
+++ b/init.lua
@@ -228,7 +228,7 @@ local on_digiline_receive_alnum = function(pos, node, channel, msg)
 	local meta = minetest.get_meta(pos)
 	local setchan = meta:get_string("channel")
 	if setchan ~= channel then return end
-	if msg then
+	if msg and msg ~= "" then
 		local asc = string.byte(msg)
 		if msg == "off" then
 			minetest.swap_node(pos, { name = "nixie_tubes:alnum_32", param2 = node.param2})