v0.2.55..v0.2.56 changeset FeatureExtractorBase.h

diff --git a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/FeatureExtractorBase.h b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/FeatureExtractorBase.h
index 4dd5cb1..1a5293e 100644
--- a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/FeatureExtractorBase.h
+++ b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/FeatureExtractorBase.h
@@ -42,8 +42,8 @@ public:
 
   static std::string className() { return "hoot::FeatureExtractorBase"; }
 
-  FeatureExtractorBase() {}
-  virtual ~FeatureExtractorBase() {}
+  FeatureExtractorBase() = default;
+  virtual ~FeatureExtractorBase() = default;
 
   static double nullValue() { return -999999999; }