Very annoying error! after new build

on of my most simplest code dont work after the new build on bukkit and i dont know. i have try much i know but still with out luck :/

Code:

public BankDoor isBankDoor(Block block)
    {
        for(BankDoor door : doors)
        {
            if(block.getX() == door.x && block.getY() == door.y && block.getZ() == door.z)
            {
                return door;
            }

            if(block.getX() == door.altX && block.getY() == door.altY && block.getZ() == door.altZ)
            {
                return door;
            }
        }

        return null;
    }

the error i get is

here is the code for BankDoor
http://pastebin.com/dTkS0SqF

 

you could try adding

if(block == null) return;

at the top, it seems to me that sometimes events give null values.
i had that problem with the blocks given by onEntityExplode

 

Thx it worked