[conformal/btcwallet] df1857: Use t.Errorf for test formatting directives.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: df18578bc9567819bb3f7d7ceee2005b8e8f1574
      
https://github.com/conformal/btcwallet/commit/df18578bc9567819bb3f7d7ceee2005b8e8f1574
  Author: Josh Rickmar <jr...@conformal.com>
  Date:   2014-05-30 (Fri, 30 May 2014)

  Changed paths:
    M wallet/wallet_test.go

  Log Message:
  -----------
  Use t.Errorf for test formatting directives.