setall fails to set time with Python 3

Created by: michaalbert

Hi! I had the follwing issue using setall() on Debian 9.4 with Python 3.5: Instead of setting a time for a task it leaves the task's time field blank.

cron = CronTab()
job = cron.new(command=foo')
job_t =  datetime.time(0, 30, 0, 0)
job.setall(job_t)
print(job)

Expected output:

30 0 * * * foo

Actual output:

* * * * * foo