* dbus/dbus-message.c (dbus_message_iter_append_dict): Set
	wrote_dict_key to FALSE on the iter that the dict is appended to,
	just like when appending other types. Fixes a bug where a dict
	couldn't be put inside a dict.
	(dbus_message_iter_append_dict_key): Fix typo in warning message.
	(message_iter_test, _dbus_message_test): Add test case for dict
	inside dict.