Remove possibility of sending duplicate MeetmeJoin manager events, and only...

Remove possibility of sending duplicate MeetmeJoin manager events, and only send a MeetmeLeave event if a MeetmeJoin event occured in the first place. (issue #6599 reported by imran - provided patch with few tiny mods)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@30409 65c4cc65-6c06-0410-ace0-fbb531ad65f3