Move Fill(0) to reduce code size
Move Fill(0) to reduce code size

chainer/chainer,chainer/chainer,okuta/chainer,okuta/chainer,keisuke-umezawa/chainer,okuta/chainer,pfnet/chainer,hvy/chainer,chainer/chainer,niboshi/chainer,keisuke-umezawa/chainer,wkentaro/chainer,niboshi/chainer,niboshi/chainer,keisuke-umezawa/chainer,hvy/chainer,hvy/chainer,hvy/chainer,keisuke-umezawa/chainer,okuta/chainer,chainer/chainer,niboshi/chainer,wkentaro/chainer,wkentaro/chainer,wkentaro/chainer,tkerola/chainer