Lightning payment complete, but Charge didn't register it?

@weex grabbed me on IRC; he paid but the UI was still spinning.

I checked the server, it has indeed been paid:

```
lightning-cli --lightning-dir ~/.lightning/mainnet/ listinvoice | grep c65791aab5ba8aed9b85b188bd6b7d5cb70238026f54d2d1a70c797ad8d9465e
{ "label" : "gjxvasjiIwZb1H13wXgG7", "payment_hash" : "c65791aab5ba8aed9b85b188bd6b7d5cb70238026f54d2d1a70c797ad8d9465e", "msatoshi" : 212434387, "complete" : true, "pay_index" : 3, "msatoshi_received" : 212434387, "expiry_time" : 1516159063 },
```

In case it was just that the gui was stuck I told him to reload, but no joy:

https://twitter.com/weex/status/953488332649984000

He also hasn't received the conf. mail, so I think something is stuck?