Another fix for potential streaming errors.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5967 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/io/streamers/ByteArrayStreamer.as

@@ -54,7 +54,9 @@ public class ByteArrayStreamer extends Streamer
     override public function readObject (obj :Object, ins :ObjectInputStream) :void
     {
         var bytes :ByteArray = (obj as ByteArray);
-        ins.readBytes(bytes, 0, bytes.length);
+        if (bytes.length > 0) {
+            ins.readBytes(bytes, 0, bytes.length);
+        }
     }
 }
 }