Use empty slots as end for logistics requests

Count up to 100 empty slots past the last seen slot with data in it
before stopping to look for personal logistics slots in inventory_sync.
Allows unlimeted amount of logistics request slots to be used for
heavily modded games.

plugins/inventory_sync/module/serialize.lua

@@ -75,9 +75,11 @@ function serialize.serialize_personal_logistic_slots(player)
 	local serialized = nil
 
 	-- Serialize personal logistic slots
-	for i = 1, 200 do -- Nobody will have more than 200 logistic slots, right?
+	local last_valid = 0
+	for i = 1, 65536 do
 		local slot = player.get_personal_logistic_slot(i)
-		if slot.name ~= nil then
+		if slot.name then
+			last_valid = i
 			if not serialized then
 				serialized = {}
 			end
@@ -86,6 +88,10 @@ function serialize.serialize_personal_logistic_slots(player)
 				min = slot.min,
 				max = slot.max,
 			}
+
+		-- Stop after 100 empty slots
+		elseif last_valid + 100 <= i then
+			break
 		end
 	end
 
@@ -98,10 +104,9 @@ function serialize.deserialize_personal_logistic_slots(player, serialized)
 	end
 
 	-- Load personal logistic slots
-	for i = 1, 200 do
-		local slot = serialized[tostring(i)] -- 1 is empty to force array to be spare
+	for i, slot in pairs(serialized) do
 		if slot ~= nil then
-			player.set_personal_logistic_slot(i, slot)
+			player.set_personal_logistic_slot(tonumber(i), slot)
 		end
 	end
 end