Part: hiding tag handling functions as protected until a need for them is clear

src/Mod/Part/App/Geometry.h

@@ -93,6 +93,7 @@ public:
     bool Construction;
     /// returns the tag of the geometry object
     boost::uuids::uuid getTag() const;
+protected:
     /// create a new tag for the geometry object
     void createNewTag();
     /// copies the tag from the geometry passed as a parameter to this object