Fix a gap between codes for CPU and GPU in Adam
Fix a gap between codes for CPU and GPU in Adam

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