Merged revisions 231298 via svnmerge from

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

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  r231298 | tilghman | 2009-11-25 16:31:57 -0600 (Wed, 25 Nov 2009) | 2 lines
  
  After a frame duplication failure, unlock the channel before returning.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@231299 65c4cc65-6c06-0410-ace0-fbb531ad65f3