Fix expected warning message
Fix expected warning message

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