From d8d968a680bd2d6fa04989c38c079dc8bf21c737 Mon Sep 17 00:00:00 2001
From: Marek Kotewicz <marek.kotewicz@gmail.com>
Date: Wed, 24 Jun 2015 23:25:13 +0200
Subject: [PATCH] getBlockBy** and getBlockTransactionCountBy** return null if
 block is not found