Fix infinite end portal loop

Should resolve Multiverse#113 Multiverse#108 Multiverse#105 and Multiverse#104

src/main/java/com/onarandombox/MultiverseNetherPortals/listeners/MVNPPlayerListener.java

@@ -87,7 +87,7 @@ public void onPlayerPortal(PlayerPortalEvent event) {
  if (event.getFrom().getWorld().equals(event.getTo().getWorld())) {
  // The player is Portaling to the same world.
  this.plugin.log(Level.FINER, "Player '" + event.getPlayer().getName() + "' is portaling to the same world. Ignoring.");
- event.setTo(originalTo);
+ event.setCancelled(true);
  return;
  }
  MultiverseWorld fromWorld = this.worldManager.getMVWorld(event.getFrom().getWorld().getName());