Serialization update

src/engine/net/client/msg/ManageNPCMsg.java

@@ -27,8 +27,6 @@ import org.pmw.tinylog.Logger;
 
 import java.util.ArrayList;
 import java.util.HashSet;
-import java.util.List;
-import java.util.stream.Collectors;
 
 /**
  * Order NPC
@@ -436,12 +434,13 @@ public class ManageNPCMsg extends ClientNetMsg {
                             writer.put((byte) template.modTable);//EffectItemType
                         }
 
-                        List<Item> itemList = ForgeManager.vendorItemLookup.get(npc);
-                        itemList = itemList.stream().limit(npc.getRank()).collect(Collectors.toList());
+                        // Sanity check.
 
-                        writer.putInt(itemList.size());
+                        ForgeManager.vendorItemLookup.computeIfAbsent(npc, k -> new ArrayList<>()); // Forge lookup
 
-                        for (Item item : itemList) {
+                        writer.putInt(ForgeManager.vendorItemLookup.get(npc).size());
+
+                        for (Item item : ForgeManager.vendorItemLookup.get(npc)) {
 
                             writer.put((byte) 0); // ? Unknown45
                             writer.putInt(item.getObjectType().ordinal());