Fixed PlayerPickupItem event returning wrong amount picked up and added function to get the amount remaining on the ground.

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

@@ -10,10 +10,12 @@ import org.bukkit.event.Cancellable;
 public class PlayerPickupItemEvent extends PlayerEvent implements Cancellable {
     private final Item item;
     private boolean cancel = false;
+    private int remaining;
 
-    public PlayerPickupItemEvent(final Player player, final Item item) {
+    public PlayerPickupItemEvent(final Player player, final Item item, int remaining) {
         super(Type.PLAYER_PICKUP_ITEM, player);
         this.item = item;
+        this.remaining = remaining;
     }
 
     /**
@@ -25,6 +27,15 @@ public class PlayerPickupItemEvent extends PlayerEvent implements Cancellable {
         return item;
     }
 
+    /**
+     * Gets the amount remaining on the ground, if any
+     *
+     * @return amount remaining on the ground
+     */
+    public int getRemaining() {
+        return remaining;
+    }
+
     /**
      * Gets the cancellation state of this event. A cancelled event will not
      * be executed in the server, but will still pass to other plugins