Save the dstchannel before the call gets answered so that we would know what...

Save the dstchannel before the call gets answered so that we would know what destination channel was dialed when we get the channel hanged up


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1331 65c4cc65-6c06-0410-ace0-fbb531ad65f3