COMP: fix compilation warning

Code/Projections/otbUtmMapProjection.h

@@ -53,7 +53,7 @@ public:
   virtual void SetZone(long zone);
   virtual void SetHemisphere(char hemisphere);
   virtual int GetZone() const;
-  virtual const char GetHemisphere() const;
+  virtual char GetHemisphere() const;
 
   virtual void SetZoneAndHemisphereFromGeoPoint(const InputPointType& geoPoint);
   virtual int GetZoneFromGeoPoint(const InputPointType& geoPoint) const;

Code/Projections/otbUtmMapProjection.txx

@@ -68,7 +68,7 @@ int UtmMapProjection<TTransform>
 
 ///\return the hemisphere
 template <TransformDirection::TransformationDirection TTransform>
-const char UtmMapProjection<TTransform>
+char UtmMapProjection<TTransform>
 ::GetHemisphere() const
 {
   char hemisphere = this->m_MapProjection->getHemisphere();