Merged revisions 169869 via svnmerge from

Merged revisions 169869 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r169869 | file | 2009-01-21 19:25:27 -0400 (Wed, 21 Jan 2009) | 11 lines

  Merged revisions 169867 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.4

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    r169867 | file | 2009-01-21 19:20:47 -0400 (Wed, 21 Jan 2009) | 4 lines

    Read lock the contexts to maintain the locking order when we are notified that the state of a device has changed.
    (closes issue #13839)
    Reported by: mcallist
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@169870 65c4cc65-6c06-0410-ace0-fbb531ad65f3