don't write frames out to channel until after sending them to spies and/or...

don't write frames out to channel until after sending them to spies and/or monitor, since the channel driver might modify the frame data in the buffer (bug #4623)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6035 65c4cc65-6c06-0410-ace0-fbb531ad65f3