
  This code makes sure we read from a local block,
if available.  I thought this code had already been
committed some time ago, but the workspace doesn't
have it.



git-svn-id: 4d48d1092ee340c9ada5711cdbe4355b138bc22b@383197 13f79535-47bb-0310-9956-ffa450edef68

awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop