[conformal/btcd] edf8f2: Use curHeight in mempool transaction add.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: edf8f2f224680a97e626b63c81f2cd7e175ee5a3
      
https://github.com/conformal/btcd/commit/edf8f2f224680a97e626b63c81f2cd7e175ee5a3
  Author: Dave Collins <da...@conformal.com>
  Date:   2013-12-25 (Wed, 25 Dec 2013)

  Changed paths:
    M mempool.go

  Log Message:
  -----------
  Use curHeight in mempool transaction add.

Since there is already a variable for the current block height in addition
to the next block height, use the existing curHeight variable instead
doing nextBlockHeight-1 in mempool add.