Merged revisions 280879 via svnmerge from

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

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  r280879 | tilghman | 2010-08-04 09:04:07 -0500 (Wed, 04 Aug 2010) | 14 lines
  
  Check cur value before attempting a deref.
  
  (closes issue #17775)
   Reported by: svinson
   Patches: 
         20100804__issue17775.diff.txt uploaded by tilghman (license 14)
   Tested by: svinson
  
  (closes issue #17743)
   Reported by: tgruenberg
   Patches: 
         20100804__issue17775.diff.txt uploaded by tilghman (license 14)
   Tested by: tgruenberg
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@280880 65c4cc65-6c06-0410-ace0-fbb531ad65f3