Fix ClassCastException in tabCompletor (fixes #942)

Spigot-Server-Patches/AsyncTabCompleteEvent.patch

@@ -80,15 +80,17 @@ index 5a620f3fd..35774f8bf 100644
  
      public void a(PacketPlayInSettings packetplayinsettings) {
 diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
-index aa098172f..883aca80a 100644
+index aa098172f..09eb79439 100644
 --- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
 @@ -0,0 +0,0 @@ public final class CraftServer implements Server {
+         } else {
              offers = tabCompleteChat(player, message);
          }
- 
+-
 -        TabCompleteEvent tabEvent = new TabCompleteEvent(player, message, offers);
-+        TabCompleteEvent tabEvent = new TabCompleteEvent(player, message, offers, message.startsWith("/") || forceCommand, pos != null ? MCUtil.toLocation(((EntityPlayer) player).world, pos) : null); // Paper
++        
++        TabCompleteEvent tabEvent = new TabCompleteEvent(player, message, offers, message.startsWith("/") || forceCommand, pos != null ? MCUtil.toLocation(((CraftWorld) player.getWorld()).getHandle(), pos) : null); // Paper
          getPluginManager().callEvent(tabEvent);
  
          return tabEvent.isCancelled() ? Collections.EMPTY_LIST : tabEvent.getCompletions();