Merged revisions 286682 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r286682 | mnicholson | 2010-09-14 13:04:21 -0500 (Tue, 14 Sep 2010) | 21 lines
  
  Merged revisions 286681 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
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    r286681 | mnicholson | 2010-09-14 13:02:24 -0500 (Tue, 14 Sep 2010) | 14 lines
    
    Merged revisions 286679 via svnmerge from 
    https://origsvn.digium.com/svn/asterisk/branches/1.4
    
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      r286679 | mnicholson | 2010-09-14 13:00:01 -0500 (Tue, 14 Sep 2010) | 7 lines
      
      Only drop duplicate answer frames if the channel is bridged.
      
      Back in r3710 ast_read() was modified to drop answer frames on channels that were in the UP state.  This modification prevented bridges that were up before the answer from being broken and reestablished by an ANSWER control frame.  That change also prevents pickup of channels called from the ast_dial framework from working properly.  The ast_dial framework expects to see an ANSWER frame after dialing and the pickup code queues one but ast_read() drops it.  This new change only drops ANSWER frames when the channel is bridged, allowing the answer queued by the pickup code to properly pass through ast_read() on to the ast_dial framework.
      
      ABE-2473
      (related to issue #2342)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@286683 65c4cc65-6c06-0410-ace0-fbb531ad65f3