edit-pane: Don't unconditionally ref due date
gtd_task_get_due_date()
can return a NULL-pointer, so we shouldn't
just try to call g_date_time_ref()
on it. Even if it doesn't return
NULL, it's already (transfer full)
, so we shouldn't be doing an extra
refcount increase in the first place.
Fixes a CRITICAL log message when setting a due date.