Recorded merge of revisions 271335 via svnmerge from

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

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  r271335 | jpeeler | 2010-06-18 13:33:17 -0500 (Fri, 18 Jun 2010) | 13 lines
  
  Eliminate deadlock potential in dahdi_fixup().
  
  (This is a backport of 269307, committed to trunk by rmudgett.)
  
  Calling dahdi_indicate() when the channel private lock is already
  held can cause a deadlock if the PRI lock is needed because
  dahdi_indicate() will also get the channel private lock.  The pri_grab()
  function assumes that the channel private lock is held once to avoid
  deadlock.
  
  (closes issue #17261)
  Reported by: aragon
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