Pass in the expected type to readObject anywhere the code would clearly convert the wrong type to null anyway

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5440 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/presents/peer/data/ClientInfo.as

@@ -53,7 +53,7 @@ public class ClientInfo extends SimpleStreamableObject
     override public function readObject (ins :ObjectInputStream) :void
     {
         super.readObject(ins);
-        username = (ins.readObject() as Name);
+        username = (ins.readObject(Name) as Name);
     }
 
     // from interface Streamable