Fix condition on shape of input type of SplitAxis
Fix condition on shape of input type of SplitAxis

kiyukuta/chainer,ktnyt/chainer,1986ks/chainer,keisuke-umezawa/chainer,wkentaro/chainer,umitanuki/chainer,elviswf/chainer,kashif/chainer,delta2323/chainer,ktnyt/chainer,cupy/cupy,hvy/chainer,minhpqn/chainer,cupy/cupy,chainer/chainer,t-abe/chainer,wkentaro/chainer,cupy/cupy,keisuke-umezawa/chainer,rezoo/chainer,muupan/chainer,aonotas/chainer,keisuke-umezawa/chainer,jnishi/chainer,chainer/chainer,sou81821/chainer,okuta/chainer,ktnyt/chainer,kikusu/chainer,tscohen/chainer,okuta/chainer,ysekky/chainer,sinhrks/chainer,hidenori-t/chainer,tkerola/chainer,niboshi/chainer,masia02/chainer,keisuke-umezawa/chainer,ytoyama/yans_chainer_hackathon,truongdq/chainer,hvy/chainer,ronekko/chainer,cupy/cupy,kuwa32/chainer,niboshi/chainer,chainer/chainer,chainer/chainer,truongdq/chainer,anaruse/chainer,laysakura/chainer,wavelets/chainer,benob/chainer,Kaisuke5/chainer,wkentaro/chainer,wkentaro/chainer,cemoody/chainer,jnishi/chainer,yanweifu/chainer,AlpacaDB/chainer,ikasumi/chainer,muupan/chainer,jfsantos/chainer,sinhrks/chainer,woodshop/chainer,woodshop/complex-chainer,niboshi/chainer,kikusu/chainer,niboshi/chainer,hvy/chainer,pfnet/chainer,okuta/chainer,tigerneil/chainer,jnishi/chainer,t-abe/chainer,okuta/chainer,ktnyt/chainer,jnishi/chainer,benob/chainer,AlpacaDB/chainer,hvy/chainer