/data/validators json: unsupported value: NaN

[pro-wh]

We've seen some intermittent cases where requesting the list of validators results in an HTTP 500 with the error

json: unsupported value: NaN

I'd guess it happens here from a 0/0.

https://github.com/everstake/oasis-explorer/blob/7b35eb1dd7f1081d29b9a76c8cac6d11661eb1a4/services/validators.go#L55

Could we maybe substitute a 0 in that case?

cc oasisprotocol/wallet#561

[danen-carlson]

The issue has been consistent for me.

[gw0]

It is happening again:

$ curl 'https://monitor.oasis.dev/data/validators?limit=500'
json: unsupported value: NaN