Check setting grad of uninitialized variable
Check setting grad of uninitialized variable

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