[master] Add virtual destructor for base class Iter

diff --git a/src/lib/dns/rrset_collection_base.h b/src/lib/dns/rrset_collection_base.h
index 27e46d1266ca7dabb3e17ca931fef55c5e83d565..35a1a9a0818f8990e2d8d6a5ab6c8fb6ee944bb4 100644 (file)
--- a/src/lib/dns/rrset_collection_base.h
+++ b/src/lib/dns/rrset_collection_base.h
@@ -72,6 +72,8 @@ protected:
     /// iterator only.
     class Iter {
     public:
+        virtual ~Iter() {};
+
         /// \brief Returns the \c AbstractRRset currently pointed to by
         /// the iterator.
         virtual const isc::dns::AbstractRRset& getValue() = 0;