fix dmlc/mxnet#521
fix dmlc/mxnet#521

ZihengJiang/mxnet,jamesliu/mxnet,wangyum/mxnet,jennyzhang0215/incubator-mxnet,larroy/mxnet,CodingCat/mxnet,indhub/mxnet,leezu/mxnet,piiswrong/mxnet,tornadomeet/mxnet,DR08/mxnet,Mega-DatA-Lab/mxnet,likelyzhao/mxnet,pluskid/mxnet,arikpoz/mxnet,danithaca/mxnet,hotpxl/mxnet,kkk669/mxnet,reminisce/mxnet,danithaca/mxnet,jamesliu/mxnet,rahul003/mxnet,jennyzhang0215/incubator-mxnet,wangyum/mxnet,jennyzhang0215/incubator-mxnet,reminisce/mxnet,jermainewang/mxnet,jiajiechen/mxnet,precedenceguo/mxnet,hotpxl/mxnet,smolix/incubator-mxnet,jennyzhang0215/incubator-mxnet,ForkedReposBak/mxnet,yuruofeifei/mxnet,leezu/mxnet,nicklhy/mxnet,lxn2/mxnet,kevinthesun/mxnet,DR08/mxnet,rahul003/mxnet,jermainewang/mxnet,ShownX/incubator-mxnet,rahul003/mxnet,ShownX/incubator-mxnet,solin319/incubator-mxnet,Prasad9/incubator-mxnet,jiajiechen/mxnet,formath/mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,Guneet-Dhillon/mxnet,sergeykolychev/mxnet,lxn2/mxnet,wangyum/mxnet,ptrendx/mxnet,DR08/mxnet,szha/mxnet,zhreshold/mxnet,szha/mxnet,tlby/mxnet,yuruofeifei/mxnet,Guneet-Dhillon/mxnet,tlby/mxnet,antoan2/incubator-mxnet,kkk669/mxnet,gautamkmr/incubator-mxnet,pluskid/mxnet,solin319/incubator-mxnet,hpi-xnor/BMXNet,jiajiechen/mxnet,stefanhenneking/mxnet,hpi-xnor/BMXNet,jermainewang/mxnet,EvanzzzZ/mxnet,solin319/incubator-mxnet,larroy/mxnet,EvanzzzZ/mxnet,arikpoz/mxnet,luoyetx/mxnet,thirdwing/mxnet,Northrend/mxnet,ptrendx/mxnet,EvanzzzZ/mxnet,navrasio/mxnet,ZihengJiang/mxnet,likelyzhao/mxnet,sergeykolychev/mxnet,szha/mxnet,weleen/mxnet,xcgoner/dist-mxnet,TuSimple/mxnet,antoan2/incubator-mxnet,apaleyes/mxnet,ForkedReposBak/mxnet,szha/mxnet,eric-haibin-lin/mxnet,saurabh3949/mxnet,indhub/mxnet,hotpxl/mxnet,Guneet-Dhillon/mxnet,TuSimple/mxnet,dmlc/mxnet,smolix/incubator-mxnet,yuruofeifei/mxnet,tornadomeet/mxnet,Northrend/mxnet,madjam/mxnet,fullfanta/mxnet,Ldpe2G/mxnet,smolix/incubator-mxnet,Ldpe2G/mxnet,larroy/mxnet,Mega-DatA-Lab/mxnet,wangyum/mxnet,ykim362/mxnet,jamesliu/mxnet,ptrendx/mxnet,Mega-DatA-Lab/mxnet,CodingCat/mxnet,jamesliu/mxnet,solin319/incubator-mxnet,pluskid/mxnet,luoyetx/mxnet,lxn2/mxnet,leezu/mxnet,vikingMei/mxnet,hotpxl/mxnet,sxjscience/mxnet,leezu/mxnet,CodingCat/mxnet,szha/mxnet,DR08/mxnet,madjam/mxnet,madjam/mxnet,TuSimple/mxnet,danithaca/mxnet,Prasad9/incubator-mxnet,likelyzhao/mxnet,tornadomeet/mxnet,thirdwing/mxnet,Mega-DatA-Lab/mxnet,ShownX/incubator-mxnet,sxjscience/mxnet,mbaijal/incubator-mxnet,sergeykolychev/mxnet,thirdwing/mxnet,DR08/mxnet,dmlc/mxnet,tlby/mxnet,piiswrong/mxnet,madjam/mxnet,ShownX/incubator-mxnet,mbaijal/incubator-mxnet,Northrend/mxnet,ZihengJiang/mxnet,ptrendx/mxnet,pluskid/mxnet,antoan2/incubator-mxnet,LinkHS/incubator-mxnet,lxn2/mxnet,rahul003/mxnet,hpi-xnor/BMXNet,Northrend/mxnet,arank/mxnet,antoan2/incubator-mxnet,Mega-DatA-Lab/mxnet,crazy-cat/incubator-mxnet,hotpxl/mxnet,zhreshold/mxnet,Northrend/mxnet,stefanhenneking/mxnet,gautamkmr/incubator-mxnet,eric-haibin-lin/mxnet,jiajiechen/mxnet,kkk669/mxnet,sergeykolychev/mxnet,pluskid/mxnet,leezu/mxnet,rishita/mxnet,weleen/mxnet,piiswrong/mxnet,ykim362/mxnet,apaleyes/mxnet,piiswrong/mxnet,hpi-xnor/BMXNet,Ldpe2G/mxnet,zhreshold/mxnet,coder-james/mxnet,EvanzzzZ/mxnet,vikingMei/mxnet,rishita/mxnet,mbaijal/incubator-mxnet,thirdwing/mxnet,apaleyes/mxnet,luoyetx/mxnet,coder-james/mxnet,ZihengJiang/mxnet,fullfanta/mxnet,wangyum/mxnet,leezu/mxnet,LinkHS/incubator-mxnet,formath/mxnet,Prasad9/incubator-mxnet,tlby/mxnet,likelyzhao/mxnet,stefanhenneking/mxnet,sergeykolychev/mxnet,Guneet-Dhillon/mxnet,Ldpe2G/mxnet,luoyetx/mxnet,LinkHS/incubator-mxnet,solin319/incubator-mxnet,precedenceguo/mxnet,xcgoner/dist-mxnet,ShownX/incubator-mxnet,sergeykolychev/mxnet,navrasio/mxnet,apaleyes/mxnet,Prasad9/incubator-mxnet,mbaijal/incubator-mxnet,CodingCat/mxnet,apaleyes/mxnet,nicklhy/mxnet,rishita/mxnet,hesseltuinhof/mxnet,jermainewang/mxnet,lxn2/mxnet,LinkHS/incubator-mxnet,indhub/mxnet,LinkHS/incubator-mxnet,zhreshold/mxnet,nicklhy/mxnet,xcgoner/dist-mxnet,kevinthesun/mxnet,EvanzzzZ/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,reminisce/mxnet,crazy-cat/incubator-mxnet,Guneet-Dhillon/mxnet,likelyzhao/mxnet,eric-haibin-lin/mxnet,gautamkmr/incubator-mxnet,vikingMei/mxnet,arikpoz/mxnet,jennyzhang0215/incubator-mxnet,DR08/mxnet,nicklhy/mxnet,fullfanta/mxnet,madjam/mxnet,lxn2/mxnet,yajiedesign/mxnet,leezu/mxnet,arikpoz/mxnet,gautamkmr/incubator-mxnet,jiajiechen/mxnet,kkk669/mxnet,yuruofeifei/mxnet,kevinthesun/mxnet,wangyum/mxnet,jiajiechen/mxnet,szha/mxnet,sxjscience/mxnet,hesseltuinhof/mxnet,ForkedReposBak/mxnet,saurabh3949/mxnet,navrasio/mxnet,larroy/mxnet,formath/mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,coder-james/mxnet,ShownX/incubator-mxnet,larroy/mxnet,stefanhenneking/mxnet,smolix/incubator-mxnet,CodingCat/mxnet,szha/mxnet,sxjscience/mxnet,apache/incubator-mxnet,sxjscience/mxnet,fullfanta/mxnet,indhub/mxnet,ptrendx/mxnet,formath/mxnet,fullfanta/mxnet,nicklhy/mxnet,sergeykolychev/mxnet,Guneet-Dhillon/mxnet,ShownX/incubator-mxnet,TuSimple/mxnet,zhreshold/mxnet,arikpoz/mxnet,indhub/mxnet,tlby/mxnet,leezu/mxnet,xcgoner/dist-mxnet,sergeykolychev/mxnet,CodingCat/mxnet,Mega-DatA-Lab/mxnet,jennyzhang0215/incubator-mxnet,jiajiechen/mxnet,indhub/mxnet,solin319/incubator-mxnet,madjam/mxnet,rishita/mxnet,TuSimple/mxnet,precedenceguo/mxnet,luoyetx/mxnet,saurabh3949/mxnet,kevinthesun/mxnet,stefanhenneking/mxnet,arikpoz/mxnet,ForkedReposBak/mxnet,antoan2/incubator-mxnet,lxn2/mxnet,reminisce/mxnet,DR08/mxnet,tlby/mxnet,Northrend/mxnet,ptrendx/mxnet,zhreshold/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,jamesliu/mxnet,weleen/mxnet,Mega-DatA-Lab/mxnet,mbaijal/incubator-mxnet,larroy/mxnet,LinkHS/incubator-mxnet,reminisce/mxnet,rishita/mxnet,ZihengJiang/mxnet,tlby/mxnet,larroy/mxnet,kevinthesun/mxnet,ykim362/mxnet,hesseltuinhof/mxnet,vikingMei/mxnet,apache/incubator-mxnet,jennyzhang0215/incubator-mxnet,apache/incubator-mxnet,luoyetx/mxnet,jermainewang/mxnet,hpi-xnor/BMXNet,formath/mxnet,solin319/incubator-mxnet,smolix/incubator-mxnet,hesseltuinhof/mxnet,crazy-cat/incubator-mxnet,tornadomeet/mxnet,eric-haibin-lin/mxnet,pluskid/mxnet,DickJC123/mxnet,ykim362/mxnet,tornadomeet/mxnet,wangyum/mxnet,rishita/mxnet,yajiedesign/mxnet,arank/mxnet,LinkHS/incubator-mxnet,sxjscience/mxnet,EvanzzzZ/mxnet,dmlc/mxnet,piiswrong/mxnet,gautamkmr/incubator-mxnet,danithaca/mxnet,tlby/mxnet,CodingCat/mxnet,kkk669/mxnet,sxjscience/mxnet,vikingMei/mxnet,gautamkmr/incubator-mxnet,ForkedReposBak/mxnet,crazy-cat/incubator-mxnet,xcgoner/dist-mxnet,Ldpe2G/mxnet,weleen/mxnet,arikpoz/mxnet,Guneet-Dhillon/mxnet,precedenceguo/mxnet,DR08/mxnet,vikingMei/mxnet,apaleyes/mxnet,tornadomeet/mxnet,yajiedesign/mxnet,dmlc/mxnet,zhreshold/mxnet,fullfanta/mxnet,nicklhy/mxnet,yajiedesign/mxnet,kkk669/mxnet,danithaca/mxnet,Northrend/mxnet,crazy-cat/incubator-mxnet,saurabh3949/mxnet,xcgoner/dist-mxnet,hesseltuinhof/mxnet,stefanhenneking/mxnet,Ldpe2G/mxnet,ZihengJiang/mxnet,jermainewang/mxnet,thirdwing/mxnet,eric-haibin-lin/mxnet,tornadomeet/mxnet,reminisce/mxnet,rahul003/mxnet,LinkHS/incubator-mxnet,arikpoz/mxnet,kevinthesun/mxnet,solin319/incubator-mxnet,kevinthesun/mxnet,dmlc/mxnet,Northrend/mxnet,piiswrong/mxnet,arank/mxnet,ptrendx/mxnet,formath/mxnet,indhub/mxnet,kkk669/mxnet,TuSimple/mxnet,tlby/mxnet,thirdwing/mxnet,Prasad9/incubator-mxnet,Prasad9/incubator-mxnet,indhub/mxnet,jamesliu/mxnet,ZihengJiang/mxnet,ShownX/incubator-mxnet,jiajiechen/mxnet,DickJC123/mxnet,ykim362/mxnet,thirdwing/mxnet,pluskid/mxnet,yuruofeifei/mxnet,tornadomeet/mxnet,smolix/incubator-mxnet,rishita/mxnet,fullfanta/mxnet,formath/mxnet,CodingCat/mxnet,antoan2/incubator-mxnet,jamesliu/mxnet,Prasad9/incubator-mxnet,Northrend/mxnet,jamesliu/mxnet,navrasio/mxnet,vikingMei/mxnet,likelyzhao/mxnet,jermainewang/mxnet,yuruofeifei/mxnet,pluskid/mxnet,yajiedesign/mxnet,crazy-cat/incubator-mxnet,saurabh3949/mxnet,navrasio/mxnet,EvanzzzZ/mxnet,TuSimple/mxnet,lxn2/mxnet,larroy/mxnet,kevinthesun/mxnet,pluskid/mxnet,indhub/mxnet,wangyum/mxnet,coder-james/mxnet,danithaca/mxnet,luoyetx/mxnet,smolix/incubator-mxnet,thirdwing/mxnet,saurabh3949/mxnet,danithaca/mxnet,ykim362/mxnet,weleen/mxnet,coder-james/mxnet,luoyetx/mxnet,madjam/mxnet,Prasad9/incubator-mxnet,likelyzhao/mxnet,jennyzhang0215/incubator-mxnet,EvanzzzZ/mxnet,DickJC123/mxnet,dmlc/mxnet,hesseltuinhof/mxnet,smolix/incubator-mxnet,antoan2/incubator-mxnet,ForkedReposBak/mxnet,vikingMei/mxnet,ForkedReposBak/mxnet,rahul003/mxnet,nicklhy/mxnet,wangyum/mxnet,hesseltuinhof/mxnet,LinkHS/incubator-mxnet,zhreshold/mxnet,navrasio/mxnet,kkk669/mxnet,TuSimple/mxnet,hotpxl/mxnet,DickJC123/mxnet,Guneet-Dhillon/mxnet,hpi-xnor/BMXNet,nicklhy/mxnet,saurabh3949/mxnet,rishita/mxnet,precedenceguo/mxnet,arank/mxnet,kevinthesun/mxnet,hesseltuinhof/mxnet,crazy-cat/incubator-mxnet,solin319/incubator-mxnet,hpi-xnor/BMXNet,hotpxl/mxnet,danithaca/mxnet,mbaijal/incubator-mxnet,crazy-cat/incubator-mxnet,madjam/mxnet,piiswrong/mxnet,yajiedesign/mxnet,jennyzhang0215/incubator-mxnet,arank/mxnet,saurabh3949/mxnet,larroy/mxnet,rahul003/mxnet,weleen/mxnet,arank/mxnet,eric-haibin-lin/mxnet,smolix/incubator-mxnet,hpi-xnor/BMXNet,apaleyes/mxnet,Guneet-Dhillon/mxnet,nicklhy/mxnet,dmlc/mxnet,szha/mxnet,weleen/mxnet,kkk669/mxnet,ptrendx/mxnet,jermainewang/mxnet,hpi-xnor/BMXNet,navrasio/mxnet,EvanzzzZ/mxnet,fullfanta/mxnet,TuSimple/mxnet,coder-james/mxnet,mbaijal/incubator-mxnet,ptrendx/mxnet,ykim362/mxnet,Ldpe2G/mxnet,coder-james/mxnet,antoan2/incubator-mxnet,arank/mxnet,DR08/mxnet,likelyzhao/mxnet,navrasio/mxnet,jermainewang/mxnet,ykim362/mxnet,xcgoner/dist-mxnet,ZihengJiang/mxnet,gautamkmr/incubator-mxnet,mbaijal/incubator-mxnet,xcgoner/dist-mxnet,hesseltuinhof/mxnet,navrasio/mxnet,Mega-DatA-Lab/mxnet,precedenceguo/mxnet,stefanhenneking/mxnet,rahul003/mxnet,arikpoz/mxnet,jiajiechen/mxnet,yuruofeifei/mxnet,formath/mxnet,thirdwing/mxnet,reminisce/mxnet,arank/mxnet,weleen/mxnet,ykim362/mxnet,rishita/mxnet,gautamkmr/incubator-mxnet,hotpxl/mxnet,coder-james/mxnet,xcgoner/dist-mxnet,sxjscience/mxnet,crazy-cat/incubator-mxnet,apaleyes/mxnet,arank/mxnet,vikingMei/mxnet,Prasad9/incubator-mxnet,reminisce/mxnet,reminisce/mxnet,fullfanta/mxnet,luoyetx/mxnet,piiswrong/mxnet,ShownX/incubator-mxnet,apaleyes/mxnet,yuruofeifei/mxnet,coder-james/mxnet,dmlc/mxnet,danithaca/mxnet,formath/mxnet,lxn2/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,likelyzhao/mxnet,stefanhenneking/mxnet,TuSimple/mxnet,dmlc/mxnet,Ldpe2G/mxnet,jamesliu/mxnet,leezu/mxnet,piiswrong/mxnet,rahul003/mxnet,saurabh3949/mxnet,sxjscience/mxnet,precedenceguo/mxnet,sergeykolychev/mxnet,szha/mxnet,apache/incubator-mxnet,ZihengJiang/mxnet,madjam/mxnet,yuruofeifei/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,antoan2/incubator-mxnet,tornadomeet/mxnet,hotpxl/mxnet,stefanhenneking/mxnet,tlby/mxnet,Mega-DatA-Lab/mxnet,ptrendx/mxnet,CodingCat/mxnet,precedenceguo/mxnet,Ldpe2G/mxnet,weleen/mxnet,gautamkmr/incubator-mxnet