Merge pull request #3725 from shaibagon/drop_nd_blobs

supporting N-D Blobs in Dropout layer Reshape

src/caffe/layers/dropout_layer.cpp

@@ -23,8 +23,8 @@ void DropoutLayer<Dtype>::Reshape(const vector<Blob<Dtype>*>& bottom,
       const vector<Blob<Dtype>*>& top) {
   NeuronLayer<Dtype>::Reshape(bottom, top);
   // Set up the cache for random number generation
-  rand_vec_.Reshape(bottom[0]->num(), bottom[0]->channels(),
-      bottom[0]->height(), bottom[0]->width());
+  // ReshapeLike does not work because rand_vec_ is of Dtype uint
+  rand_vec_.Reshape(bottom[0]->shape());
 }
 
 template <typename Dtype>