fix cnn to do same behavior on batch or not
fix cnn to do same behavior on batch or not

ktnyt/chainer,okuta/chainer,hvy/chainer,rezoo/chainer,ktnyt/chainer,okuta/chainer,niboshi/chainer,okuta/chainer,jnishi/chainer,wkentaro/chainer,tkerola/chainer,chainer/chainer,keisuke-umezawa/chainer,ktnyt/chainer,niboshi/chainer,chainer/chainer,jnishi/chainer,jnishi/chainer,hvy/chainer,aonotas/chainer,wkentaro/chainer,jnishi/chainer,niboshi/chainer,hvy/chainer,wkentaro/chainer,ktnyt/chainer,hvy/chainer,ronekko/chainer,anaruse/chainer,pfnet/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,niboshi/chainer,keisuke-umezawa/chainer,wkentaro/chainer,okuta/chainer,chainer/chainer,chainer/chainer