Only update delay on full scan with items
Only update delay on full scan with items

A fast scan request will break out of a normal scan, so we don't want to
update the delay.

Also, if there are no rings for some reason, we don't want to try to
divide by zero.

troubling/hummingbird,troubling/hummingbird,creiht/hummingbird,corystone/hummingbird,creiht/hummingbird,nadeemsyed/hummingbird,nadeemsyed/hummingbird,corystone/hummingbird