[conformal/btcjson] 766d57: Replace common error with defined value.

[John C. Vernaleo]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcjson
  Commit: 766d571317a53de92d05504a6fab371d2c5e8864
      
https://github.com/conformal/btcjson/commit/766d571317a53de92d05504a6fab371d2c5e8864
  Author: John C. Vernaleo <j...@conformal.com>
  Date:   2014-07-24 (Thu, 24 Jul 2014)

  Changed paths:
    M jsonapi.go
    M test_coverage.txt

  Log Message:
  -----------
  Replace common error with defined value.