Merged revisions 292155 via svnmerge from

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

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  r292155 | dvossel | 2010-10-18 14:16:00 -0500 (Mon, 18 Oct 2010) | 2 lines
  
  Fixes build error for systems not supporting IPV6_TCLASS.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@292156 65c4cc65-6c06-0410-ace0-fbb531ad65f3