Fix bug in array_split
Fix bug in array_split

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