Make QueueStatusComplete manager event thread safe by wrapping it inside the...

 Make QueueStatusComplete manager event thread safe by wrapping it inside the already existing Queue Lock clause. #7013 (bziherl reporting)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@25523 65c4cc65-6c06-0410-ace0-fbb531ad65f3