[Bleeding] Changed event system into a new, much faster design. Huge thanks to @zml2008 & @lahwran.

src/main/java/org/bukkit/event/player/PlayerItemHeldEvent.java

@@ -1,12 +1,14 @@
 package org.bukkit.event.player;
 
 import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
 
 /**
  * Fired when a player changes their currently held item
  */
 @SuppressWarnings("serial")
 public class PlayerItemHeldEvent extends PlayerEvent {
+    private static final HandlerList handlers = new HandlerList();
     private int previous;
     private int current;
 
@@ -33,4 +35,13 @@ public class PlayerItemHeldEvent extends PlayerEvent {
     public int getNewSlot() {
         return current;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }