Fix Linear for non-vector input
Fix Linear for non-vector input

woodshop/chainer,chainer/chainer,umitanuki/chainer,truongdq/chainer,jfsantos/chainer,benob/chainer,wkentaro/chainer,ktnyt/chainer,muupan/chainer,masia02/chainer,niboshi/chainer,anaruse/chainer,hvy/chainer,delta2323/chainer,wkentaro/chainer,jnishi/chainer,hidenori-t/chainer,woodshop/complex-chainer,tkerola/chainer,wkentaro/chainer,bayerj/chainer,tereka114/chainer,jnishi/chainer,ytoyama/yans_chainer_hackathon,kuwa32/chainer,cemoody/chainer,okuta/chainer,muupan/chainer,ktnyt/chainer,okuta/chainer,keisuke-umezawa/chainer,niboshi/chainer,ktnyt/chainer,laysakura/chainer,ttakamura/chainer,keisuke-umezawa/chainer,okuta/chainer,cupy/cupy,cupy/cupy,aonotas/chainer,tigerneil/chainer,keisuke-umezawa/chainer,chainer/chainer,kikusu/chainer,truongdq/chainer,keisuke-umezawa/chainer,ktnyt/chainer,niboshi/chainer,sinhrks/chainer,t-abe/chainer,benob/chainer,elviswf/chainer,kikusu/chainer,kiyukuta/chainer,1986ks/chainer,jnishi/chainer,chainer/chainer,pfnet/chainer,sinhrks/chainer,sou81821/chainer,hvy/chainer,nushio3/chainer,kashif/chainer,ronekko/chainer,hvy/chainer,Kaisuke5/chainer,yanweifu/chainer,wavelets/chainer,ikasumi/chainer,hvy/chainer,cupy/cupy,wkentaro/chainer,ysekky/chainer,minhpqn/chainer,AlpacaDB/chainer,cupy/cupy,t-abe/chainer,okuta/chainer,ttakamura/chainer,rezoo/chainer,jnishi/chainer,chainer/chainer,tscohen/chainer,nushio3/chainer,AlpacaDB/chainer,niboshi/chainer