Enable line of sight check in Chat Trigger again. Remove thread check…

… that doesn't do anything.

src/main/java/net/aufdemrand/denizen/scripts/triggers/core/ChatTrigger.java

@@ -39,8 +39,6 @@ public void onEnable() {
     public void chatTrigger(final AsyncPlayerChatEvent event) {
         if (event.isCancelled()) return;
 
-        boolean wasInterrupted = Thread.interrupted();
-
         Callable<Boolean> call = new Callable<Boolean>() {
             public Boolean call() {
 
@@ -74,10 +72,8 @@ public Boolean call() {
                 // if enabled. Should the Player chat only when looking at the NPC? This may
                 // reduce accidental chats with NPCs.
 
-                // TODO: CraftBukkit 1.6 broke the two lines below. Think of a workaround.
-
-                //if (Settings.ChatMustSeeNPC())
-                //    if (!npc.getEntity().hasLineOfSight(event.getPlayer())) return null;
+                if (Settings.ChatMustSeeNPC())
+                    if (!npc.getEntity().hasLineOfSight(event.getPlayer())) return null;
 
                 if (Settings.ChatMustLookAtNPC())
                     if (!Rotation.isFacingEntity(event.getPlayer(), npc.getEntity(), 45)) return null;
@@ -205,10 +201,6 @@ else if (event.getMessage().toUpperCase().contains(keyword.toUpperCase()))
             e.printStackTrace();
         }
 
-        if (wasInterrupted) {
-            Thread.currentThread().interrupt();
-        }
-
         if (cancelled == null)
             return;
         event.setCancelled(cancelled);