Minor tweak... drop translation path if one exists when we get an already...

Minor tweak... drop translation path if one exists when we get an already signed linear frame in. Chances are the stream has then switched to signed linear and we no longer need the path.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@66126 65c4cc65-6c06-0410-ace0-fbb531ad65f3