ISF_FastCaloSimParametrization: Fix cppcheck 2.14 warnings.

ISF_FastCaloSimParametrization: Fix cppcheck 2.14 warnings.

Prefer returning const references to members rather than copies.

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimParametrization/tools/LArReadoutGeometry/FCAL_ChannelMap.h

@@ -45,7 +45,7 @@ public:
       tileName_t  get_tileName() const;                            //
       float       x() const;                                       //
       float       y() const;                                       //
-      std::string getHVft() const;                                 //Gabe
+      const std::string& getHVft() const;                          //Gabe
     private:                                                       //
       tileName_t  m_tileName;                                      //
       float       m_x;                                             //
@@ -202,7 +202,7 @@ FCAL_ChannelMap::TubePosition::y() const
 }
 
 
-inline std::string
+inline const std::string&
 FCAL_ChannelMap::TubePosition::getHVft() const
 {
   return m_hvFT;