* dbus/dbus-message.c: (dbus_message_append_nil),
	(dbus_message_append_int32), (dbus_message_append_uint32),
	(dbus_message_append_double), (dbus_message_append_string),
	(dbus_message_append_int32_array),
	(dbus_message_append_uint32_array),
	(dbus_message_append_double_array),
	(dbus_message_append_byte_array),
	(dbus_message_append_string_array):
	Fix all out-of-memory handling in these functions.