Fix code caching errors, and remove unused variables from init.

mods/ITEMS/mcl_bamboo/bamboo_base.lua

@@ -14,9 +14,9 @@ local node_sound = mcl_sounds.node_sound_wood_defaults()
 local DOUBLE_DROP_CHANCE = 8
 local DEBUG = false
 
-local strlen = string.len()
-local substr = string.sub()
-local rand = math.random()
+local strlen = string.len
+local substr = string.sub
+local rand = math.random
 
 -- basic bamboo nodes.
 local bamboo_def = {

mods/ITEMS/mcl_bamboo/globals.lua

@@ -9,9 +9,9 @@ local S = minetest.get_translator(modname)
 local bamboo = "mcl_bamboo:bamboo"
 local DEBUG = false
 
-local strlen = string.len()
-local substr = string.sub()
-local rand = math.random()
+local strlen = string.len
+local substr = string.sub
+local rand = math.random
 
 --Bamboo can be planted on moss blocks, grass blocks, dirt, coarse dirt, rooted dirt, gravel, mycelium, podzol, sand, red sand, or mud
 mcl_bamboo.bamboo_dirt_nodes = {

mods/ITEMS/mcl_bamboo/init.lua

@@ -7,7 +7,6 @@
 
 -- LOCALS
 local modname = minetest.get_current_modname()
-local S = minetest.get_translator(modname)
 local bamboo = "mcl_bamboo:bamboo"
 
 mcl_bamboo = {}