Merged revisions 293046 via svnmerge from

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

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  r293046 | rmudgett | 2010-10-26 10:53:58 -0500 (Tue, 26 Oct 2010) | 4 lines
  
  Allow the DAHDI driver to compile, even with a sufficiently older version of libpri.
  
  Fixes our Bamboo builds.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@293047 65c4cc65-6c06-0410-ace0-fbb531ad65f3