Changed r_shape initialization
Changed r_shape initialization

wkentaro/chainer,chainer/chainer,niboshi/chainer,wkentaro/chainer,niboshi/chainer,chainer/chainer,chainer/chainer,niboshi/chainer,hvy/chainer,hvy/chainer,pfnet/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,chainer/chainer,hvy/chainer,wkentaro/chainer