Prevent unnecessary warnings when getting rtpsource or rtpdest.
If a recognized media type was present, but the media type was not
enabled for the channel, then a warning would be emitted. For instance,
attempting to get CHANNEL(rtpsource,video) on a call with no video would
cause a warning message to appear.
With this change, the warning will only appear if the stream argument
is not recognized as being a media type that can be specified.
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@261313
65c4cc65-6c06-0410-ace0-
fbb531ad65f3