[kronolith] Bleeding day-long events

[Brian Keifer]

> ----- Message from chuck@horde.org ---------
> > I'm using Kronolith (HEAD) and am noticing that an all-day event on the
> > second-to-last day of the month also shows up on the last day of the
> > month. This happens on the month and week views;  the day view isn't
> > affected.
> 
> I just committed a fix; let me know if it breaks anything else.
> ----- End message from chuck@horde.org -----

The events from the 29th no longer show up on the 30th.  However, none of the
all-day events from the 30th are displayed on the 30th. =)

-Brian