GtkAssistant get nth page and GtkAssistant get current page APIs

[dheeraj reddy <sunsetime99 gmail com>]

Hello

I am facing problems using these APIs. on x11

1) gtk_assistant_get_nth_page ().
    it is given to pass -1 to get the last page.
    but when tried it returns NULL.

2) gtk_assistant_set_current_page ().

    it is given "If negative, the last page will be used."
    but when negative page_num is passed the application crashes.

can anyone look into these.

Thanks
Dheeraj