v0.2.55..v0.2.56 changeset LengthOfWaysVisitor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/visitors/LengthOfWaysVisitor.h b/hoot-core/src/main/cpp/hoot/core/visitors/LengthOfWaysVisitor.h
index 2b9b8d4..bf55272 100644
--- a/hoot-core/src/main/cpp/hoot/core/visitors/LengthOfWaysVisitor.h
+++ b/hoot-core/src/main/cpp/hoot/core/visitors/LengthOfWaysVisitor.h
@@ -47,6 +47,7 @@ public:
   static std::string className() { return "hoot::LengthOfWaysVisitor"; }
 
   LengthOfWaysVisitor();
+  virtual ~LengthOfWaysVisitor() = default;
 
   static Meters getLengthOfWays(const OsmMapPtr& map, ElementPtr e);