Merged revisions 201261 via svnmerge from

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

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  r201261 | kpfleming | 2009-06-17 07:03:25 -0500 (Wed, 17 Jun 2009) | 9 lines
  
  Correct AST_LIST_APPEND_LIST behavior when list to be appended is empty.
  
  When the list to be appended is empty, and the list to be appended to is *not*,
  AST_LIST_APPEND_LIST would actually cause the target list to become broken,
  and no longer have a pointer to its last entry. This patch fixes the problem.
  
  (reported by Stanislaw Pitucha on the asterisk-dev mailing list)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@201262 65c4cc65-6c06-0410-ace0-fbb531ad65f3