Merged revisions 201450 via svnmerge from

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

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  r201450 | mmichelson | 2009-06-17 14:59:31 -0500 (Wed, 17 Jun 2009) | 9 lines
  
  Change the datastore traversal in ast_do_masquerade to use a safe list traversal.
  
  It is possible for datastore fixup functions to remove the datastore from the list
  and free it. In particular, the queue_transfer_fixup in app_queue does this. While
  I don't yet know of this causing any crashes, it certainly could.
  
  Found while discussing a separate issue with Brian Degenhardt.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@201458 65c4cc65-6c06-0410-ace0-fbb531ad65f3