Add missing virtual destructor.

diff --git a/src/lib/state.h b/src/lib/state.h
index 7843c34c86a06269fb33432c7ef04dd0fcc2b0ca..4e3d45cf87905a968fb96bed3cd8f3b584353083 100644 (file)
--- a/src/lib/state.h
+++ b/src/lib/state.h
@@ -28,6 +28,7 @@
 class State : public boost::noncopyable
 {
 public:
+       virtual ~State() {}
        virtual void read () = 0;
        virtual void write () const = 0;