Removed global variables (quests, throwing)

mods/quests/central_message.lua

@@ -1,4 +1,4 @@
-if (cmsg) then
+if rawget(_G, "cmsg") then
 	function quests.show_message(t, playername, text)
 		if (quests.hud[playername].central_message_enabled) then
 			local player = minetest.get_player_by_name(playername)

mods/throwing/functions.lua

@@ -123,7 +123,7 @@ function throwing_register_bow (name, desc, scale, stiffness, reload_time, tough
 		recipe = craft
 	})
 
-	craft_width = 1
+	local craft_width = 1
 	-- Since # isn't stable especially when there are nils in the table, count by hand
 	for _,v in ipairs(craft) do
 		for i,__ in ipairs(v) do
@@ -132,7 +132,7 @@ function throwing_register_bow (name, desc, scale, stiffness, reload_time, tough
 			end
 		end
 	end
-	rev_craft = {}
+	local rev_craft = {}
 	for i,y in ipairs(craft) do
 		rev_craft[i] = {}
 		for j,x in ipairs(y) do