Fix forward function
Fix forward function

benob/chainer,wkentaro/chainer,ysekky/chainer,kashif/chainer,niboshi/chainer,chainer/chainer,jnishi/chainer,okuta/chainer,jnishi/chainer,tkerola/chainer,kikusu/chainer,kikusu/chainer,AlpacaDB/chainer,chainer/chainer,niboshi/chainer,cemoody/chainer,delta2323/chainer,keisuke-umezawa/chainer,wkentaro/chainer,niboshi/chainer,hvy/chainer,ktnyt/chainer,kiyukuta/chainer,ktnyt/chainer,cupy/cupy,wkentaro/chainer,jnishi/chainer,rezoo/chainer,pfnet/chainer,ktnyt/chainer,jnishi/chainer,niboshi/chainer,okuta/chainer,chainer/chainer,anaruse/chainer,ronekko/chainer,ktnyt/chainer,keisuke-umezawa/chainer,cupy/cupy,cupy/cupy,benob/chainer,aonotas/chainer,AlpacaDB/chainer,keisuke-umezawa/chainer,chainer/chainer,wkentaro/chainer,keisuke-umezawa/chainer,okuta/chainer,hvy/chainer,cupy/cupy,hvy/chainer,okuta/chainer,hvy/chainer