diff -r -U 3 minecraft\net\minecraft\util\ObjectIntIdentityMap.java minecraft_patched\net\minecraft\util\ObjectIntIdentityMap.java
--- minecraft\net\minecraft\util\ObjectIntIdentityMap.java
+++ minecraft_patched\net\minecraft\util\ObjectIntIdentityMap.java
@@ -25,7 +25,7 @@
       this.field_148749_a.put(p_148746_1_, Integer.valueOf(p_148746_2_));
 
       while(this.field_148748_b.size() <= p_148746_2_) {
-         this.field_148748_b.add((Object)null);
+         this.field_148748_b.add(null);
       }
 
       this.field_148748_b.set(p_148746_2_, p_148746_1_);
