fixed crash at shutdown

Destination.cpp

@@ -51,11 +51,16 @@ namespace client
 
 	ClientDestination::~ClientDestination ()
 	{
-		Stop ();
+		if (m_IsRunning)	
+			Stop ();
 		for (auto it: m_RemoteLeaseSets)
 			delete it.second;
 		if (m_Pool)
 			i2p::tunnel::tunnels.DeleteTunnelPool (m_Pool);		
+		if (m_StreamingDestination)
+			delete m_StreamingDestination;
+		if (m_DatagramDestination)
+			delete m_DatagramDestination;
 	}	
 
 	void ClientDestination::Run ()