[conformal/btcd] a546fa: Correct getdata throttling.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: a546fa1b2ad48c1452f3d9b34bb5b00eeb5aa824
      
https://github.com/conformal/btcd/commit/a546fa1b2ad48c1452f3d9b34bb5b00eeb5aa824
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-07-03 (Thu, 03 Jul 2014)

  Changed paths:
    M peer.go

  Log Message:
  -----------
  Correct getdata throttling.

This commit corrects an issue where the data requested by getdata was not
being properly throttled which could lead to higher than desired memory
usage on large requests.