v0.2.55..v0.2.56 changeset CollectionRelationCriterion.h

diff --git a/hoot-core/src/main/cpp/hoot/core/criterion/CollectionRelationCriterion.h b/hoot-core/src/main/cpp/hoot/core/criterion/CollectionRelationCriterion.h
index 30ceafe..48c9275 100644
--- a/hoot-core/src/main/cpp/hoot/core/criterion/CollectionRelationCriterion.h
+++ b/hoot-core/src/main/cpp/hoot/core/criterion/CollectionRelationCriterion.h
@@ -42,7 +42,8 @@ public:
 
   static std::string className() { return "hoot::CollectionRelationCriterion"; }
 
-  CollectionRelationCriterion();
+  CollectionRelationCriterion() = default;
+  virtual ~CollectionRelationCriterion() = default;
 
   virtual bool isSatisfied(const ConstElementPtr& e) const override;