cron.go: don't log nil error
Issue #294
new
When setting a cron, the log shows “<nil>”, upon inspection this is because an error is being logged unnecessarily.
log.Printf("cron run: setting %s=%q for site=%d: %v", job.Var, job.Data, job.Skey, err)
This is on line 174.
The same thing happens on line 182 for deleting a cron:
log.Printf("cron run: deleting %s for site=%d: %v", job.Var, job.Skey, err)
err shouldn’t be logged here either.