Merged revisions 70164 via svnmerge from

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

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r70164 | russell | 2007-06-19 19:03:22 -0500 (Tue, 19 Jun 2007) | 2 lines

don't delete the backtrace in ast_grab_core

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@70234 65c4cc65-6c06-0410-ace0-fbb531ad65f3