v0.2.55..v0.2.56 changeset NonConflatableCriterion.h

diff --git a/hoot-core/src/main/cpp/hoot/core/criterion/NonConflatableCriterion.h b/hoot-core/src/main/cpp/hoot/core/criterion/NonConflatableCriterion.h
index 37473a1..ab65f81 100644
--- a/hoot-core/src/main/cpp/hoot/core/criterion/NonConflatableCriterion.h
+++ b/hoot-core/src/main/cpp/hoot/core/criterion/NonConflatableCriterion.h
@@ -54,6 +54,7 @@ public:
 
   NonConflatableCriterion();
   NonConflatableCriterion(ConstOsmMapPtr map);
+  virtual ~NonConflatableCriterion() = default;
 
   virtual bool isSatisfied(const ConstElementPtr& e) const override;