Fix warning message
Fix warning message

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