Merged revisions 243486 via svnmerge from

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

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  r243486 | mmichelson | 2010-01-27 12:06:43 -0600 (Wed, 27 Jan 2010) | 3 lines
  
  Use a safe list traversal while checking for duplicate vars in pbx_builtin_setvar_helper.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@243487 65c4cc65-6c06-0410-ace0-fbb531ad65f3