[lworld] Move null check from method entry into i2c adapter

[Tobias Hartmann]

Thanks, Roland.

Best regards,
Tobias

On 31.05.2018 13:26, Roland Westrelin wrote:
> 
>> http://cr.openjdk.java.net/~thartmann/valhalla/lworld/adapter_null_check/
> 
> Looks good to me.
> 
> Roland.
>