Fix errors on world change

src/net/jitse/npclib/api/NPC.java

@@ -150,7 +150,7 @@ public abstract class NPC {
 
             shown.remove(player.getUniqueId());
 
-            if (player.getLocation().distance(location) <= autoHideDistance) {
+            if (player.getWorld() == location.getWorld() && player.getLocation().distance(location) <= autoHideDistance) {
                 sendHidePackets(player);
             } else {
                 if (autoHidden.contains(player.getUniqueId())) {

src/net/jitse/npclib/listeners/PlayerListener.java

@@ -30,8 +30,8 @@ public class PlayerListener implements Listener {
                 npc.getAutoHidden().remove(player.getUniqueId());
             }
 
-            if (npc.isActuallyShown(player)) {
-                npc.hide(player);
+            if (npc.getShown().contains(player.getUniqueId())) {
+                npc.getShown().remove(player.getUniqueId());
             }
         }
     }