Fix weak vtables

src/blackmisc/geo/coordinategeodetic.cpp

@@ -25,6 +25,9 @@ namespace BlackMisc
 {
     namespace Geo
     {
+        ICoordinateGeodetic::~ICoordinateGeodetic()
+        { }
+
         QString CCoordinateGeodetic::convertToQString(bool i18n) const
         {
             return ICoordinateGeodetic::convertToQString(i18n);

src/blackmisc/geo/coordinategeodetic.h

@@ -56,7 +56,7 @@ namespace BlackMisc
             };
 
             //! Destructor
-            virtual ~ICoordinateGeodetic() {}
+            virtual ~ICoordinateGeodetic();
 
             //! Latitude
             virtual CLatitude latitude() const = 0;