[conformal/btcjson] 26802c: Fix JSONGetMethod to prevent panics on bad input.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcjson
  Commit: 26802c7eccfb484141a1488c9ef40e5b5805d96c
      
https://github.com/conformal/btcjson/commit/26802c7eccfb484141a1488c9ef40e5b5805d96c
  Author: Josh Rickmar <jr...@conformal.com>
  Date:   2014-09-16 (Tue, 16 Sep 2014)

  Changed paths:
    M jsonapi.go

  Log Message:
  -----------
  Fix JSONGetMethod to prevent panics on bad input.

ok @jcvernaleo