implement serialize

src/mlpack/methods/ann/layer/pooling_layer.hpp

@@ -162,6 +162,14 @@ class PoolingLayer
   OutputDataType& Delta() const { return delta; }
   //! Modify the delta.
   OutputDataType& Delta() { return delta; }
+  
+  /**
+   * Serialize the layer
+   */
+  template<typename Archive>
+  void Serialize(Archive& ar, const unsigned int /* version */)
+  {    				
+  }
 
  private:
   /**