Fix some global variable warnings

mods/CORE/mcl_util/init.lua

@@ -267,7 +267,7 @@ function mcl_util.generate_on_place_plant_function(condition)
 
 			if success then
 				if idef.sounds and idef.sounds.place then
-					minetest.sound_play(idef.sounds.place, {pos=above, gain=1})
+					minetest.sound_play(idef.sounds.place, {pos=pointed_thing.above, gain=1})
 				end
 			end
 			itemstack = new_itemstack

mods/HUD/mcl_inventory/init.lua

@@ -141,7 +141,7 @@ minetest.register_on_joinplayer(function(player)
 			set_inventory(player, true)
 		end
 		armor:set_player_armor(player)
-		update_inventory_original(self, player)
+		armor:update_inventory(player)
 	end
 
 	-- In Creative Mode, the initial inventory setup is handled in creative.lua

mods/ITEMS/REDSTONE/mesecons_pistons/init.lua

@@ -55,9 +55,9 @@ piston_get_direction = function (dir, node)
 end
 
 local piston_remove_pusher = function (pos, node)
-	pistonspec = minetest.registered_nodes[node.name].mesecons_piston
+	local pistonspec = minetest.registered_nodes[node.name].mesecons_piston
 
-	dir = piston_get_direction(pistonspec.dir, node)
+	local dir = piston_get_direction(pistonspec.dir, node)
 	local pusherpos = mesecon:addPosRule(pos, dir)
 	local pushername = minetest.get_node(pusherpos).name
 

mods/ITEMS/mcl_throwing/throwable.lua

@@ -18,7 +18,7 @@ local velocities = {
 
 mcl_throwing.throw = function(throw_item, pos, dir, velocity)
 	if velocity == nil then
-		velocity = velocities[entity_name]
+		velocity = velocities[throw_item]
 	end
 	if velocity == nil then
 		velocity = 22