Fix problem pointed out by Long-Fei
Fix problem pointed out by Long-Fei

putcn/Paddle,yu239/Paddle,Canpio/Paddle,reyoung/Paddle,tensor-tang/Paddle,hedaoyuan/Paddle,Canpio/Paddle,hedaoyuan/Paddle,pengli09/Paddle,cxysteven/Paddle,chengduoZH/Paddle,livc/Paddle,PaddlePaddle/Paddle,hedaoyuan/Paddle,putcn/Paddle,putcn/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,wen-bo-yang/Paddle,chengduoZH/Paddle,emailweixu/Paddle,cxysteven/Paddle,baidu/Paddle,lispc/Paddle,jacquesqiao/Paddle,Canpio/Paddle,reyoung/Paddle,pengli09/Paddle,pkuyym/Paddle,reyoung/Paddle,chengduoZH/Paddle,cxysteven/Paddle,wen-bo-yang/Paddle,QiJune/Paddle,PaddlePaddle/Paddle,yu239/Paddle,gangliao/Paddle,lcy-seso/Paddle,lispc/Paddle,yu239/Paddle,gangliao/Paddle,putcn/Paddle,gangliao/Paddle,luotao1/Paddle,hedaoyuan/Paddle,wen-bo-yang/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,putcn/Paddle,cxysteven/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle,yu239/Paddle,lispc/Paddle,hedaoyuan/Paddle,gangliao/Paddle,PaddlePaddle/Paddle,QiJune/Paddle,pengli09/Paddle,lcy-seso/Paddle,reyoung/Paddle,gangliao/Paddle,lispc/Paddle,pengli09/Paddle,QiJune/Paddle,QiJune/Paddle,lispc/Paddle,pkuyym/Paddle,yu239/Paddle,tensor-tang/Paddle,cxysteven/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,wen-bo-yang/Paddle,reyoung/Paddle,lispc/Paddle,livc/Paddle,livc/Paddle,hedaoyuan/Paddle,tensor-tang/Paddle,pengli09/Paddle,reyoung/Paddle,QiJune/Paddle,pkuyym/Paddle,tensor-tang/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,pengli09/Paddle,wen-bo-yang/Paddle,hedaoyuan/Paddle,jacquesqiao/Paddle,emailweixu/Paddle,Canpio/Paddle,pengli09/Paddle,baidu/Paddle,Canpio/Paddle,livc/Paddle,lispc/Paddle,lcy-seso/Paddle,livc/Paddle,emailweixu/Paddle,emailweixu/Paddle,putcn/Paddle,jacquesqiao/Paddle,yu239/Paddle,Canpio/Paddle,Canpio/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,lispc/Paddle,pkuyym/Paddle,hedaoyuan/Paddle,cxysteven/Paddle,pkuyym/Paddle,livc/Paddle,gangliao/Paddle,luotao1/Paddle,QiJune/Paddle,livc/Paddle,luotao1/Paddle,wen-bo-yang/Paddle,cxysteven/Paddle,baidu/Paddle,baidu/Paddle,emailweixu/Paddle,luotao1/Paddle,lcy-seso/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,emailweixu/Paddle,baidu/Paddle,pengli09/Paddle,luotao1/Paddle,yu239/Paddle,wen-bo-yang/Paddle,gangliao/Paddle,luotao1/Paddle,yu239/Paddle,emailweixu/Paddle,lcy-seso/Paddle