handle other mods not expecting nil in player meta

player.lua

@@ -56,9 +56,12 @@ function creative_regions:restore_player_inventory(player, listname)
 	end
 end
 
+local DAYNIGHT_AUTO = -1
+local DAYNIGHT_UNSET = -2
+
 function creative_regions:save_player_day_night_ratio(player)
 	local current_day_night_ratio = player:get_day_night_ratio()
-	if current_day_night_ratio == nil then current_day_night_ratio = -1 end
+	if current_day_night_ratio == nil then current_day_night_ratio = DAYNIGHT_AUTO end
 	local pmeta = player:get_meta()
 	pmeta:set_int("creative_regions_day_night_ratio", current_day_night_ratio)
 end
@@ -67,10 +70,10 @@ function creative_regions:restore_player_day_night_ratio(player)
 	local pmeta = player:get_meta()
 	local current_day_night_ratio = player:get_day_night_ratio()
 	local saved_day_night_ratio = pmeta:get_int("creative_region_day_night_ratio")
-	if saved_day_night_ratio ~= nil then
-		if saved_day_night_ratio == -1 then saved_day_night_ratio = nil end
+	if saved_day_night_ratio ~= nil and saved_day_night_ratio ~= DAYNIGHT_UNSET then
+		if saved_day_night_ratio == DAYNIGHT_AUTO then saved_day_night_ratio = nil end
 		player:override_day_night_ratio(saved_day_night_ratio)
-		pmeta:set_int("creative_regions_day_night_ratio", nil)
+		pmeta:set_int("creative_regions_day_night_ratio", DAYNIGHT_UNSET)
 	end
 	return current_day_night_ratio
 end