due to sending packets in the wrong order during hangup.
Also make sure we clear tones/messages on the correct line/instance.
Issue 10291, patch by DEA, tested by sbisker and myself.
git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@77883 65c4cc65-6c06-0410-ace0-fbb531ad65f3