Merged revisions 222351 via svnmerge from

Merged revisions 222351 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r222351 | jpeeler | 2009-10-06 15:35:19 -0500 (Tue, 06 Oct 2009) | 9 lines

  Fix 222298 (crash during destruction of second channel when variable set with
  setvar).

  I mistakenly reasoned that setvar would be used on all channels. Since it can
  be set per channel, give each dahdi channel a copy of the variable.

  (related to #15899)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@222353 65c4cc65-6c06-0410-ace0-fbb531ad65f3