[seed] Fix missing signal test

[Tim Horton <hortont src gnome org>]

commit 478c02751e32b327feeb5b52a5069e2c049446aa
Author: Tim Horton <hortont424 gmail com>
Date:   Thu Feb 18 18:19:04 2010 -0500

    Fix missing signal test

 tests/javascript/signals/signal-invalid.js |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/tests/javascript/signals/signal-invalid.js b/tests/javascript/signals/signal-invalid.js
index 9d4fe6b..006fb1e 100755
--- a/tests/javascript/signals/signal-invalid.js
+++ b/tests/javascript/signals/signal-invalid.js
@@ -6,4 +6,13 @@ Gtk.init(Seed.argv)
 
 w = new Gtk.Window()
 
-testsuite.assert(w.signal.notasignal == undefined)
+try
+{
+    a = w.signal.notasignal;
+    testsuite.unreachable();
+}
+catch(e)
+{
+    testsuite.assert(e.message == "Failed to connect to notasignal. Invalid signal name.");
+}
+