[btcsuite/btcd] 45dfa1: txscript: Remove excessive error check.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 45dfa1a9cd0fa031c0cc0106990794a61da13313
      
https://github.com/btcsuite/btcd/commit/45dfa1a9cd0fa031c0cc0106990794a61da13313
  Author: Josh Rickmar <jr...@conformal.com>
  Date:   2015-02-08 (Sun, 08 Feb 2015)

  Changed paths:
    M txscript/script.go

  Log Message:
  -----------
  txscript: Remove excessive error check.