[gjs] Show a debug message when DBus introspection fails

[Giovanni Campagna <gcampagna src gnome org>]

commit 7924d95fa48629c53063c6cb308869728bd6bdf4
Author: James Willcox <jwillcox litl com>
Date:   Wed Jan 20 12:46:51 2010 -0500

    Show a debug message when DBus introspection fails
    
    https://bugzilla.gnome.org/show_bug.cgi?id=607589

 modules/dbus-exports.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/modules/dbus-exports.c b/modules/dbus-exports.c
index 8feb62e..d7ba22e 100644
--- a/modules/dbus-exports.c
+++ b/modules/dbus-exports.c
@@ -1482,6 +1482,7 @@ handle_introspect(JSContext      *context,
 
         if (!JS_CallFunctionName(context, obj, "getDBusInterfaceXML", 0, NULL,
                                  &valueval)) {
+            gjs_debug(GJS_DEBUG_DBUS, "Error calling getDBusInterfaceXML (did you forget to call conformExport?)");
             gjs_log_exception(context, NULL);
         } else if (!gjs_string_to_utf8(context, valueval, &interfaceXML)) {
             gjs_debug(GJS_DEBUG_DBUS,