v0.2.55..v0.2.56 changeset DistanceScoreExtractor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/DistanceScoreExtractor.h b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/DistanceScoreExtractor.h
index 03091e5..f0daea5 100644
--- a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/DistanceScoreExtractor.h
+++ b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/DistanceScoreExtractor.h
@@ -22,7 +22,7 @@
  * This will properly maintain the copyright information. DigitalGlobe
  * copyrights will be updated automatically.
  *
- * @copyright Copyright (C) 2015, 2017, 2018, 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ * @copyright Copyright (C) 2015, 2017, 2018, 2019, 2020 DigitalGlobe (http://www.digitalglobe.com/)
  */
 #ifndef DISTANCESCOREEXTRACTOR_H
 #define DISTANCESCOREEXTRACTOR_H
@@ -44,7 +44,8 @@ public:
 
   DistanceScoreExtractor(ValueAggregatorPtr wayAgg);
 
-  DistanceScoreExtractor();
+  DistanceScoreExtractor() = default;
+  virtual ~DistanceScoreExtractor() = default;
 
   virtual std::string getClassName() const override { return className(); }