[evolution-dbus-session] Handle method calls with GUnixFDList

This is required to have properly propagated calls like OpenFile,
which use it.

Related to GNOME/evolution#169

src/tools/evolution-dbus-session/evolution-dbus-session.c

@@ -164,25 +164,57 @@ handle_method_call_cb (GDBusConnection *connection,
 		       GDBusMethodInvocation *invocation,
 		       gpointer user_data)
 {
+#ifdef G_OS_UNIX
+	GDBusMessage *message;
+	GUnixFDList *in_fd_list, *out_fd_list = NULL;
+#endif
 	ProxyData *pd = user_data;
 	GVariant *result;
 	GError *error = NULL;
 
 	g_return_if_fail (pd != NULL);
 
-	result = g_dbus_connection_call_sync (g_dbus_proxy_get_connection (pd->proxy),
-		g_dbus_proxy_get_name (pd->proxy),
-		object_path,
-		interface_name,
-		method_name,
-		parameters,
-		NULL,
-		G_DBUS_CALL_FLAGS_NONE,
-		DBUS_CALL_TIMEOUT,
-		NULL, &error);
+#ifdef G_OS_UNIX
+	message = g_dbus_method_invocation_get_message (invocation);
+	in_fd_list = g_dbus_message_get_unix_fd_list (message);
+
+	if (in_fd_list) {
+		result = g_dbus_connection_call_with_unix_fd_list_sync (g_dbus_proxy_get_connection (pd->proxy),
+			g_dbus_proxy_get_name (pd->proxy),
+			object_path,
+			interface_name,
+			method_name,
+			parameters,
+			NULL,
+			G_DBUS_CALL_FLAGS_NONE,
+			DBUS_CALL_TIMEOUT,
+			in_fd_list,
+			&out_fd_list,
+			NULL, &error);
+	} else {
+#endif
+		result = g_dbus_connection_call_sync (g_dbus_proxy_get_connection (pd->proxy),
+			g_dbus_proxy_get_name (pd->proxy),
+			object_path,
+			interface_name,
+			method_name,
+			parameters,
+			NULL,
+			G_DBUS_CALL_FLAGS_NONE,
+			DBUS_CALL_TIMEOUT,
+			NULL, &error);
+#ifdef G_OS_UNIX
+	}
+#endif
 
 	if (result) {
-		g_dbus_method_invocation_return_value (invocation, result);
+		#ifdef G_OS_UNIX
+		if (out_fd_list) {
+			g_dbus_method_invocation_return_value_with_unix_fd_list (invocation, result, out_fd_list);
+			g_object_unref (out_fd_list);
+		} else
+		#endif
+			g_dbus_method_invocation_return_value (invocation, result);
 		g_variant_unref (result);
 	} else {
 		g_dbus_method_invocation_return_gerror (invocation, error);