Merged revisions 104102 via svnmerge from

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

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r104102 | russell | 2008-02-25 17:19:05 -0600 (Mon, 25 Feb 2008) | 7 lines

Improve the lock tracking code a bit so that a bunch of old locks that threads
failed to lock don't sit around in the history.  When a lock is first locked,
this checks to see if the last lock in the list was one that was failed to be
locked.  If it is, then that was a lock that we're no longer sitting in a trylock
loop trying to lock, so just remove it.
(inspired by issue #11712)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@104103 65c4cc65-6c06-0410-ace0-fbb531ad65f3