Fix memset
Fix memset

pfnet/chainer,wkentaro/chainer,rezoo/chainer,chainer/chainer,wkentaro/chainer,niboshi/chainer,laysakura/chainer,hidenori-t/chainer,kiyukuta/chainer,ysekky/chainer,okuta/chainer,muupan/chainer,hvy/chainer,cupy/cupy,anaruse/chainer,niboshi/chainer,AlpacaDB/chainer,chainer/chainer,cupy/cupy,benob/chainer,sinhrks/chainer,tkerola/chainer,t-abe/chainer,chainer/chainer,niboshi/chainer,sinhrks/chainer,umitanuki/chainer,yanweifu/chainer,ktnyt/chainer,masia02/chainer,AlpacaDB/chainer,okuta/chainer,ktnyt/chainer,kikusu/chainer,hvy/chainer,t-abe/chainer,muupan/chainer,tigerneil/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,hvy/chainer,kikusu/chainer,wkentaro/chainer,ktnyt/chainer,benob/chainer,ktnyt/chainer,ikasumi/chainer,truongdq/chainer,kashif/chainer,tscohen/chainer,cemoody/chainer,wkentaro/chainer,chainer/chainer,hvy/chainer,niboshi/chainer,jnishi/chainer,ytoyama/yans_chainer_hackathon,keisuke-umezawa/chainer,jnishi/chainer,delta2323/chainer,okuta/chainer,okuta/chainer,sou81821/chainer,keisuke-umezawa/chainer,cupy/cupy,cupy/cupy,truongdq/chainer,minhpqn/chainer,Kaisuke5/chainer,1986ks/chainer,aonotas/chainer,ronekko/chainer,jnishi/chainer,jnishi/chainer