* bus/driver.c (write_args_for_direction): Use
	_dbus_string_get_const_data to retrieve string;
	_dbus_string_get_const_data_len doesn't actually return
	a NULL-terminated substring.

	* test/glib/test-service-glib.c: Include dbus-glib-bindings.h.
	(main): Change to use org_freedesktop_DBus_request_name
	instead of using g_proxy_begin_call/end_call.