find peer early exit

FindPeer may fail to find all addresses associated with a peer, if the first respondee to the query does not have all addresses. 

Example:

```
A FindPeer(X) -> {B, C}

B replies: {X : [127.0.0.1:4001]}
A ends find peer
C replies {X : [76.45.35.75:4001]} and is ignored since A ended the query
```

I will address this soon, just wanted to file a bug so i remember.
