Fixed some bugs with reading data back from the server, including

subtracting 4 from the length of the frame and fixing the reading
of fields for which we have a basic streamer.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3885 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/presents/client/Communicator.as

@@ -133,6 +133,8 @@ public class Communicator
     {
         // convert the frame data into a message from the server
         var frameData :ByteArray = event.getFrameData();
+        //trace("length of in frame: " + frameData.length);
+        //trace("inBuffer: " + Util.bytesToString(frameData));
         _inStream.setSource(frameData);
         var msg :DownstreamMessage =
             (_inStream.readObject() as DownstreamMessage);