[nag] Small user interface bug

[joe@digitalworx.net]

I've noticed a small bug in the "Adding A New Task" interface.  I'm not sure if 
this is the right place to report it or even if it's been reported before (I've 
looked around and couldn't find any archives for this list), but here goes:

Whenever you change any of the date drop downs to set a due date for a task, 
the radio button gets set back to "No due date".  I just changed /nag/tasks.php 
line 45 to read:

$javascript = 'onchange="document.task.due_type[1].checked = true;"';

instead of 

$javascript = 'onchange="document.task.due_type[0].checked = true;"';

Thanks.