--- ../src-base/minecraft/net/minecraft/inventory/Slot.java
+++ ../src-work/minecraft/net/minecraft/inventory/Slot.java
@@ -10,7 +10,7 @@
 
 public class Slot
 {
-    private final int slotIndex;
+    public final int slotIndex; // CraftBukkit - private -> public
     public final IInventory inventory;
     public int slotNumber;
     public int xDisplayPosition;
