Fix ensuring shape-dtype pair.
Fix ensuring shape-dtype pair.

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