Packet and Streamer errors when running validators or bench-tps

[sagar-solana]

Problem

It appears that #1546 has introduced a bug where running local testnet, the following warnings flood the logs with the following messages. The logs are not benign.

 WARN 2018-11-16T01:33:49.536805171Z: solana::packet: error sending 44 byte packet to V4(0.0.0.0:0): Os { code: 22, kind: InvalidInput, message: "Invalid argument" }
 WARN 2018-11-16T01:33:49.536887901Z: solana::streamer: ncp responder error: IO(Os { code: 22, kind: InvalidInput, message: "Invalid argument" })

Proposed Solution