Fix get_device
Fix get_device

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