Add 0.4 compability layer (translator)

init.lua

@@ -1,4 +1,30 @@
-local S = minetest.get_translator("teleports")
+local S
+if minetest.translate then
+	S = minetest.get_translator("teleports")
+else
+	-- Compability translator code to support MT 0.4, which doesn't support
+	-- translations for mods.
+
+	local function translate(textdomain, str, ...)
+		local arg = {n=select('#', ...), ...}
+		return str:gsub("@(.)", function(matched)
+			local c = string.byte(matched)
+			if string.byte("1") <= c and c <= string.byte("9") then
+				return arg[c - string.byte("0")]
+			else
+				return matched
+			end
+		end)
+	end
+
+	S = function(textdomain)
+		return function(str, ...)
+			return translate(textdomain or "", str, ...)
+		end
+	end
+end
+
+
 local F = minetest.formspec_escape
 
 teleports = {}