fix duplicate scifi_nodes declaration

common.lua

@@ -1,6 +1,6 @@
 
 
-function scifi_nodes.get_switch_rules(param2)
+scifi_nodes.get_switch_rules = function(param2)
 
 	-- param2 = 2
 	local rules = {

doors.lua

@@ -15,7 +15,6 @@
 
 
 -- Retrieving mod settings
-local scifi_nodes = {}
 scifi_nodes.doors_open_with_mesecon_only = minetest.settings:get_bool("scifi_nodes.doors_open_with_mesecon_only", false)
 
 -- Some aliases to deal with old namming policy --

models.lua

@@ -2,8 +2,6 @@
 --Copyright (c) 2011-2015 Calinou and contributors.
 --Licensed under the zlib license.
 
-scifi_nodes = {}
-
 function scifi_nodes.register_slope(name, desc, texture, light)
 minetest.register_node("scifi_nodes:slope_"..name, {
 	description = desc.." Slope",
@@ -174,4 +172,3 @@ if minetest.global_exists("stairsplus") then
 		})
 	end
 end
-