[conformal/btcd] 70094f: Minor cleanup.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: 70094fcee87d98139eb019298ad66be8d0eebb8c
      
https://github.com/conformal/btcd/commit/70094fcee87d98139eb019298ad66be8d0eebb8c
  Author: Dave Collins <da...@conformal.com>
  Date:   2013-10-30 (Wed, 30 Oct 2013)

  Changed paths:
    M blockmanager.go
    M mempool.go

  Log Message:
  -----------
  Minor cleanup.

Fix a couple of comments and call tx.Sha directly in a couple of places.