Merged revisions 183559 via svnmerge from

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

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r183559 | russell | 2009-03-20 11:53:25 -0500 (Fri, 20 Mar 2009) | 2 lines

Fix a crash in IAX2 registration handling found during load testing with dvossel.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@183560 65c4cc65-6c06-0410-ace0-fbb531ad65f3