[conformal/btcutil] 4a3482: update comment.

[David Hill]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcutil
  Commit: 4a3482182f11534d3c9350f812b73e5d1f3287a5
      
https://github.com/conformal/btcutil/commit/4a3482182f11534d3c9350f812b73e5d1f3287a5
  Author: David Hill <dh...@conformal.com>
  Date:   2014-07-10 (Thu, 10 Jul 2014)

  Changed paths:
    M bloom/merkleblock.go

  Log Message:
  -----------
  update comment.