v0.2.55..v0.2.56 changeset CompactnessExtractor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/CompactnessExtractor.h b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/CompactnessExtractor.h
index 8facff3..333deb3 100644
--- a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/CompactnessExtractor.h
+++ b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/CompactnessExtractor.h
@@ -23,7 +23,7 @@
  * copyrights will be updated automatically.
  *
  * @copyright Copyright (C) 2005 VividSolutions (http://www.vividsolutions.com/)
- * @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 COMPACTNESSEXTRACTOR_H
 #define COMPACTNESSEXTRACTOR_H
@@ -55,7 +55,8 @@ class CompactnessExtractor : public FeatureExtractorBase
 {
 public:
 
-  CompactnessExtractor();
+  CompactnessExtractor() = default;
+  virtual ~CompactnessExtractor() = default;
 
   static std::string className() { return "hoot::CompactnessExtractor"; }