v0.2.55..v0.2.56 changeset LinearWaterwayCriterion.h

diff --git a/hoot-core/src/main/cpp/hoot/core/criterion/LinearWaterwayCriterion.h b/hoot-core/src/main/cpp/hoot/core/criterion/LinearWaterwayCriterion.h
index f5f31a7..ca312f3 100644
--- a/hoot-core/src/main/cpp/hoot/core/criterion/LinearWaterwayCriterion.h
+++ b/hoot-core/src/main/cpp/hoot/core/criterion/LinearWaterwayCriterion.h
@@ -41,7 +41,8 @@ class LinearWaterwayCriterion : public ConflatableElementCriterion
 public:
   static std::string className() { return "hoot::LinearWaterwayCriterion"; }
 
-  LinearWaterwayCriterion() {}
+  LinearWaterwayCriterion() = default;
+  virtual ~LinearWaterwayCriterion() = default;
 
   virtual bool isSatisfied(const ConstElementPtr& e) const override;