Merged revisions 275665 via svnmerge from

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

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  r275665 | jpeeler | 2010-07-12 11:58:39 -0500 (Mon, 12 Jul 2010) | 11 lines
  
  Change ast_write to not stop generator when called from ast_prod.
  
  For SIP channels configured with the progressinband option on, the ringback was
  being immediately stopped. This problem was due to ast_prod being moved for a
  deadlock fix in 259858. Prodding the channel after setting up the generator
  triggered the check in ast_write to stop the generator. The fix here should
  write the frame the same as was done before the call to ast_prod was moved.
  
  (closes issue #17372)
  Reported by: tech_admin
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@275682 65c4cc65-6c06-0410-ace0-fbb531ad65f3