fix when image_encode failed in im2rec.py (#4636)
fix when image_encode failed in im2rec.py (#4636)


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