Fix uninitialized param
Fix uninitialized param

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