Fix regression that changed behavior of queues when ringing a queue member.

Fix regression that changed behavior of queues when ringing a queue member.

This reverts r298596, which was to fix a highly bizarre and contrived issue
with a queue member that called into his own queue being transferred back
into his own queue.  I couldn't reproduce that issue in any way.  I think one
of the other recent transfer fixes actually fixed this.

(closes issue #18747)
Reported by: vrban

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@308002 65c4cc65-6c06-0410-ace0-fbb531ad65f3