Finally do something about the famous "midnight bug"

Finally do something about the famous "midnight bug"

For years my SXEmacs would crash at midnight if I were running Sawfish and
no SXEmacs frame had the focus.  And even though this changeset doesn't
actually fix the bug, it does mean it won't get triggered again.

	* 12-cal-sy.el (sy-update-diary-font-lock-keywords): Removed.
	Also remove the #'run-at-time call

	* 12-cal-sy.el (calendar-move-hook): Have it update the displayed
	diary entries as you move to different dates.

	* 12-cal-sy.el (calendar-mode-hook): Update the font-lock keywords
	here.

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