Merge branch 'add-get-prop-model'

Close !262

* add-get-prop-model:
  spectum: Fixes style of the last change on spectrum-channel.cc
  spectrum: Retrieve a pointer to the propagation model

src/spectrum/model/spectrum-channel.cc

@@ -149,5 +149,11 @@ SpectrumChannel::GetSpectrumPropagationLossModel (void)
   return m_spectrumPropagationLoss;
 }
 
+Ptr<PropagationLossModel>
+SpectrumChannel::GetPropagationLossModel ()
+{
+  return m_propagationLoss;
+}
+
 
 } // namespace

src/spectrum/model/spectrum-channel.h

@@ -95,7 +95,11 @@ public:
    */
   Ptr<SpectrumPropagationLossModel> GetSpectrumPropagationLossModel (void);
 
-
+  /**
+   * Get the propagation loss model.
+   * \returns a pointer to the propagation loss model.
+   */
+  Ptr<PropagationLossModel> GetPropagationLossModel (void);
 
   /**
    * Used by attached PHY instances to transmit signals on the channel