Merged revisions 269417 via svnmerge from

Merged revisions 269417 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r269417 | russell | 2010-06-09 16:11:43 -0500 (Wed, 09 Jun 2010) | 6 lines

  Resolve an invalid memory read on an event.

  Valgrind pointed out that attempting to get an IE value from an event that has
  no IEs produces an invalid memory read past the end of the event.  Thanks to
  mmichelson for pointing the problem out to me and then testing the fix.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@269418 65c4cc65-6c06-0410-ace0-fbb531ad65f3