v0.2.55..v0.2.56 changeset EuclideanDistanceExtractor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/EuclideanDistanceExtractor.h b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/EuclideanDistanceExtractor.h
index 75d8734..b57be3c 100644
--- a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/EuclideanDistanceExtractor.h
+++ b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/EuclideanDistanceExtractor.h
@@ -39,6 +39,7 @@ class EuclideanDistanceExtractor : public AbstractDistanceExtractor, public Conf
 public:
 
   EuclideanDistanceExtractor();
+  virtual ~EuclideanDistanceExtractor() = default;
 
   static std::string className() { return "hoot::EuclideanDistanceExtractor"; }