[#1430] Add a connection reference which most likely belong to libdbus

sflphone-common/libs/dbus-c++/src/connection.cpp

@@ -80,7 +80,7 @@ Connection::Private::~Private()
 void Connection::Private::init()
 {
 	dbus_connection_ref(conn);
-	// dbus_connection_ref(conn);	//todo: the library has to own another reference
+	dbus_connection_ref(conn);	//todo: the library has to own another reference
 
 	disconn_filter = new Callback<Connection::Private, bool, const Message &>(
 		this, &Connection::Private::disconn_filter_function