Merged revisions 324955 via svnmerge from

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

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  r324955 | tilghman | 2011-06-27 11:30:50 -0500 (Mon, 27 Jun 2011) | 5 lines
  
  Save and restore errno from within signal handlers.
  
  This is recommended by the POSIX standard, as well as by the sigaction(2) manpage
  for various platforms that we support (e.g. Mac OS X).
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@324961 65c4cc65-6c06-0410-ace0-fbb531ad65f3