[btcsuite/btcd] 2dfda4: Correct typo

[Alex Bosworth]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 2dfda48b94f93bbd117bf06334c5c444b7ed736b
      
https://github.com/btcsuite/btcd/commit/2dfda48b94f93bbd117bf06334c5c444b7ed736b
  Author: Alex Bosworth <alexboswo...@users.noreply.github.com>
  Date:   2017-01-11 (Wed, 11 Jan 2017)

  Changed paths:
    M blockchain/blocklocator.go

  Log Message:
  -----------
  Correct typo