[Bleeding] Implemented Inventory.{get,set}MaxStackSize(). Addresses BUKKIT-1076

- Custom inventories also respect this setting now.

src/main/java/net/minecraft/server/InventoryLargeChest.java

@@ -45,6 +45,11 @@ public class InventoryLargeChest implements IInventory {
     public InventoryHolder getOwner() {
         return null; // This method won't be called since CraftInventoryDoubleChest doesn't defer to here
     }
+
+    public void setMaxStackSize(int size) {
+        this.left.setMaxStackSize(size);
+        this.right.setMaxStackSize(size);
+    }
     // CraftBukkit end
 
     public InventoryLargeChest(String s, IInventory iinventory, IInventory iinventory1) {
@@ -90,7 +95,7 @@ public class InventoryLargeChest implements IInventory {
     }
 
     public int getMaxStackSize() {
-        return this.left.getMaxStackSize();
+        return Math.min(this.left.getMaxStackSize(), this.right.getMaxStackSize()); // CraftBukkit - check both sides
     }
 
     public void update() {