Merged revisions 336381 via svnmerge from

Merged revisions 336381 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/10

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  r336381 | oej | 2011-09-19 12:05:00 +0200 (Mån, 19 Sep 2011) | 16 lines

  Merged revisions 336378 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.8

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    r336378 | oej | 2011-09-19 11:40:44 +0200 (Mån, 19 Sep 2011) | 9 lines

    Add missing unlock at MWI message sending time

    (closes issue ASTERISK-18573)

    Patches:
       sip_mwi_lock.patch (license #5041) by Gregory Hinton Nietsky

    Thanks to irrot for the reminder, to Gregory for the patch!
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@336382 65c4cc65-6c06-0410-ace0-fbb531ad65f3