[conformal/btcd] 4e5cd1: Allow nil conversion handlers in btcctl.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: 4e5cd1a32626efd5e5a5f29f36409129a6686e4b
      
https://github.com/conformal/btcd/commit/4e5cd1a32626efd5e5a5f29f36409129a6686e4b
  Author: Dave Collins <da...@conformal.com>
  Date:   2013-10-21 (Mon, 21 Oct 2013)

  Changed paths:
    M util/btcctl/btcctl.go

  Log Message:
  -----------
  Allow nil conversion handlers in btcctl.