Removed two global variables

Thanks to crabman for having warned me.

minetestforfun_game/mods/sethome/init.lua

@@ -15,7 +15,7 @@ home.sethome = function(name)
 	end
     home.homepos[p_status][player:get_player_name()] = pos
     minetest.chat_send_player(name, "Home set!")
-    changed = true
+    local CHANGED = true
     if changed then
     	local output = io.open(home.homes_file[p_status], "w")
         for i, v in pairs(home.homepos[p_status]) do

mods/unified_inventory/register.lua

@@ -48,7 +48,7 @@ unified_inventory.register_button("home_gui_set", {
 	tooltip = S("Set home position"),
 	action = function(player)
 		minetest.sound_play("dingdong",
-					{to_player=player_name, gain = 1.0})
+					{to_player=player:get_player_name(), gain = 1.0})
 		home.sethome(player:get_player_name())
 	end,
 })