Gnus -- Minor tweak define #'time-to-seconds

Gnus -- Minor tweak define #'time-to-seconds

	* xemacs-packages/gnus/lisp/sxepkg.el: Don't need the float-time
	alias any longer.
	Autoload #'message-goto-body for mm-extern.el.

	* xemacs-packages/gnus/lisp/time-date.el (date-to-time): Put the
	autoload cookie where it will actually cause the func to be
	autoloaded.
	(time-to-seconds): Don't try to be clever with when this is
	defined, just define it at toplevel.
	(float-time): Inline autoload it.

Signed-off-by: Steve Youngs <steve@sxemacs.org>