Do not depend on having an end sound for stopping the bridge when time runs...

Do not depend on having an end sound for stopping the bridge when time runs out. (issue #6979 reported by ppyy)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@21130 65c4cc65-6c06-0410-ace0-fbb531ad65f3