fixed leak in q_webthreeconnector in mainwin

alethzero/MainWin.cpp

@@ -153,8 +153,7 @@ Main::Main(QWidget *parent) :
 
 	m_webThree.reset(new WebThreeDirect(string("AlethZero/v") + dev::Version + "/" DEV_QUOTED(ETH_BUILD_TYPE) "/" DEV_QUOTED(ETH_BUILD_PLATFORM), getDataDir() + "/AlethZero", false, {"eth", "shh"}));
 
-	// w3stubserver, on dealloc, deletes m_qwebConnector
-	m_qwebConnector = new QWebThreeConnector(); // owned by WebThreeStubServer
+	m_qwebConnector.reset(new QWebThreeConnector());
 	m_server.reset(new OurWebThreeStubServer(*m_qwebConnector, *web3(), keysAsVector(m_myKeys)));
 	connect(&*m_server, SIGNAL(onNewId(QString)), SLOT(addNewId(QString)));
 	m_server->setIdentities(keysAsVector(owned()));

alethzero/MainWin.h

@@ -256,7 +256,7 @@ private:
 	QString m_logHistory;
 	bool m_logChanged = true;
 
-	QWebThreeConnector* m_qwebConnector;
+	std::unique_ptr<QWebThreeConnector> m_qwebConnector;
 	std::unique_ptr<OurWebThreeStubServer> m_server;
 	QWebThree* m_qweb = nullptr;
 };