Merged revisions 322981 via svnmerge from

Merged revisions 322981 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r322981 | twilson | 2011-06-10 08:29:00 -0700 (Fri, 10 Jun 2011) | 11 lines

  Avoid a DB1 infinite loop bug

  Explicity check the last entry in the DB and make sure that we don't iterate
  past it. Since there can be no duplicates, this just makes sure that we stop
  after matching the last key.

  This patch also refactors the code to get away from some code duplication. A
  previous patch added many astdb tests and this patch passed them.

  Review: https://reviewboard.asterisk.org/r/1259/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@322982 65c4cc65-6c06-0410-ace0-fbb531ad65f3