added virtual destructors to base classes

and bumped version to 0.4

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/opkele/types.h b/include/opkele/types.h
index 8f4bf73..f732a1e 100644
--- a/include/opkele/types.h
+++ b/include/opkele/types.h
@@ -62,12 +62,14 @@ namespace opkele {
     /**
      * Interface to the association.
      */
     class association_t {
         public:
 
+            virtual ~association_t() { }
+
             /**
              * retrieve the server with which association was established.
              * @return server name
              */
             virtual string server() const = 0;
             /**