From ff328a9971b8942a38d3fc83e898845723762606 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