Merged revisions 154365 via svnmerge from

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

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  r154365 | tilghman | 2008-11-04 14:49:33 -0600 (Tue, 04 Nov 2008) | 9 lines
  
  On busy systems, it's possible for the values checked within a single line
  of code to change, unless the structure is locked to ensure a consistent
  state.
  (closes issue #13717)
   Reported by: kowalma
   Patches: 
         20081102__bug13717.diff.txt uploaded by Corydon76 (license 14)
   Tested by: kowalma
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@154366 65c4cc65-6c06-0410-ace0-fbb531ad65f3