fixes input check. fixes _make_inputs.
fixes input check.
fixes _make_inputs.

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