From ec716d6d8567f8d15051535bf3c5d40143ce1573 Mon Sep 17 00:00:00 2001
From: Ian Wong <yiheng.wang@intel.com>
Date: Mon, 18 Dec 2017 14:12:18 +0800
Subject: [PATCH] fix null pointer exception in bn when affine is false (#2045)

* fix null pointer exception in bn when affine is false

* meet code review