add @Override to getReceiverCode and dispatchNotification so running genreceiver doesn't step all over Dave's auto @Override adder

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4708 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/tools/decoder.tmpl

@@ -27,13 +27,13 @@ public class ${name}Decoder extends InvocationDecoder
         this.receiver = receiver;
     }
 
-    // documentation inherited
+    @Override // documentation inherited
     public String getReceiverCode ()
     {
         return RECEIVER_CODE;
     }
 
-    // documentation inherited
+    @Override // documentation inherited
     public void dispatchNotification (int methodId, Object[] args)
     {
         switch (methodId) {