Merged revisions 329145 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/10

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  r329145 | rmudgett | 2011-07-21 11:52:17 -0500 (Thu, 21 Jul 2011) | 16 lines
  
  Merged revisions 329144 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.8
  
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    r329144 | rmudgett | 2011-07-21 11:46:21 -0500 (Thu, 21 Jul 2011) | 9 lines
    
    Dialplan bridge() app mutex 'current_dest_chan' freed more times than we've locked!
    
    This appears to be a leftover from when ast_channel was converted to ao2
    objects.
    
    Simply removed the extraneous unlock.
    
    (closes issue ASTERISK-17772)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@329146 65c4cc65-6c06-0410-ace0-fbb531ad65f3