Use the overloaded default methods for default transport.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5115 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/tools/InvocationTask.java

@@ -261,9 +261,9 @@ public abstract class InvocationTask extends Task
                 hint = method.getDeclaringClass().getAnnotation(TransportHint.class);
             }
             if (hint == null) {
-                return "Transport.DEFAULT";
+                return "";
             }
-            return "Transport.getInstance(Transport.Type." +
+            return ", Transport.getInstance(Transport.Type." +
                 hint.type().name() + ", " + hint.channel() + ")";
         }