null parameter warning issue.

[David Robin <david robin st com>]

hi everyone,

when i use this piece of code:

 gtk_menu_popup(
                GTK_MENU (context_menu),
                GTK_WIDGET (NULL),             // GtkWidget
*parent_menu_shell,
                GTK_WIDGET (NULL),             // GtkWidget
*parent_menu_item,
                GTK_SIGNAL_FUNC(NULL),  // not really GTK_SIGNAL_FUNC
but works anyway.
                NULL,                          // gpointer data,
                event->button,
                event->time
                );

I get twice "Gtk-WARNING **: invalid cast from (NULL) pointer to
`GtkWidget'" during execution.
It seems to be caused by the "GTK_WIDGET (NULL)" parameters.
I'd like to know how to get ride of those warnings, because i'd like to
output data on stdout/err.

David.