From 4704b4cf2b2c840e29125adcb1a535be8818f2e5 Mon Sep 17 00:00:00 2001
From: Duane <duane@duanerobertson.com>
Date: Mon, 27 Jun 2016 08:06:26 -0500
Subject: [PATCH] More variable == nil checks.

---
 tesseract.lua | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tesseract.lua b/tesseract.lua
index c985687..aab554e 100644
--- a/tesseract.lua
+++ b/tesseract.lua
@@ -325,6 +325,9 @@ minetest.register_craft({
 local function translocate(pos, node, clicker, itemstack, pointed_thing)
 	local meta = minetest.get_meta(pos)
 	local id = meta:get_string('id')
+	if not (id and tonumber(id)) then
+		return
+	end
 	local pair = fun_caves.db.translocators[tonumber(id)]
 	if not pair or #pair < 2 then
 		return
@@ -344,6 +347,9 @@ local function trans_use(itemstack, user, pointed_thing)
 		return
 	end
 	local data = minetest.deserialize(itemstack:get_metadata())
+	if not (data and data.id) then
+		return
+	end
 	local player_name = user:get_player_name()
 	minetest.chat_send_player(player_name, "You see a serial number: "..data.id)
 end
@@ -354,6 +360,9 @@ local function trans_place(itemstack, placer, pointed_thing)
 	end
 
 	local data = minetest.deserialize(itemstack:get_metadata())
+	if not (data and data.id) then
+		return
+	end
 	local pos = pointed_thing.above
 	local pair = fun_caves.db.translocators[tonumber(data.id)]
 	if #pair > 1 then