Adds virtual destructors to handler interfaces fixes #136

src/roles/client.hpp

@@ -187,6 +187,8 @@ public:
     // handler interface callback class
     class handler_interface {
     public:
+    	virtual ~handler_interface() {}
+    	
         // Required
         virtual void on_open(connection_ptr con) {}
         virtual void on_close(connection_ptr con) {}

src/roles/server.hpp

@@ -174,6 +174,8 @@ public:
     // handler interface callback base class
     class handler_interface {
     public:
+        virtual ~handler_interface() {}
+        
         virtual void on_handshake_init(connection_ptr con) {}
         
         virtual void validate(connection_ptr con) {}

src/sockets/plain.hpp

@@ -52,6 +52,8 @@ public:
     // hooks that this policy adds to handlers of connections that use it
     class handler_interface {
     public:
+    	virtual ~handler_interface() {}
+    	
         virtual void on_tcp_init() {};
     };
     

src/sockets/tls.hpp

@@ -69,6 +69,8 @@ public:
     // to set up their asio TLS context.
     class handler_interface {
     public:
+    	virtual ~handler_interface() {}
+    	
         virtual void on_tcp_init() {};
         virtual boost::shared_ptr<boost::asio::ssl::context> on_tls_init() = 0;
     };