From 00d473811a5d3634f4045cabbb2e9a716aa2b0f1 Mon Sep 17 00:00:00 2001
From: qiuxin2012 <qiuxin2012cs@gmail.com>
Date: Wed, 24 May 2017 14:52:59 +0800
Subject: [PATCH] fix ConcatTable.clearState() don't clear gradInput when
 gradInput is a table