Merged revisions 273793 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r273793 | tilghman | 2010-07-02 16:36:39 -0500 (Fri, 02 Jul 2010) | 9 lines
  
  Have the DEADLOCK_AVOIDANCE macro warn when an unlock fails, to help catch potentially large software bugs.
  
  (closes issue #17407)
   Reported by: pdf
   Patches: 
         20100527__issue17407.diff.txt uploaded by tilghman (license 14)
   
  Review: https://reviewboard.asterisk.org/r/751/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@273830 65c4cc65-6c06-0410-ace0-fbb531ad65f3