[Summary] Gives to WavesDialog the ability to response on Enter from numeric keyboard (little second enter). Igor's request.

[Reviewed] YPozdniakov

gtk2_ardour/waves_dialog.cc

@@ -120,6 +120,7 @@ WavesDialog::on_key_press_event (GdkEventKey* ev)
     switch (ev->keyval)
     {
         case GDK_Return:
+        case GDK_KP_Enter:
             hide ();
             response (WavesDialog::RESPONSE_DEFAULT);
             return true;