Merged revisions 104536 via svnmerge from

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

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r104536 | file | 2008-02-27 11:52:02 -0400 (Wed, 27 Feb 2008) | 4 lines

Only stop the MWI monitor thread if it was actually started.
(closes issue #12086)
Reported by: francesco_r

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@104537 65c4cc65-6c06-0410-ace0-fbb531ad65f3