default initialize the generated ENTER_NOTIFY event with 0, otherwise not

default initialize the generated ENTER_NOTIFY event with 0, otherwise not

Sat Feb 17 06:47:27 2001  Tim Janik  <timj@gtk.org>

        * gtk/gtkmenu.c (gtk_menu_motion_notify): default initialize the
        generated ENTER_NOTIFY event with 0, otherwise not explicitely
        setup fields contain garbage (e.g. subwindow, breaking
        gdk_drawable_ref() upon event copy).
        (gtk_menu_stop_navigating_submenu_cb): same here.

        * gtk/gtklist.c (gtk_list_vertical_timeout):
        * gtk/gtklist.c (gtk_list_horizontal_timeout):
        * gtk/gtkclist.c (vertical_timeout):
        * gtk/gtkclist.c (horizontal_timeout): change direct assignment
        default-zero-intialization for unions to memset(,0,), as unions are
        not fully default-zero-initialized by compilers (GdkEvent x = { 0, };
        has to become GdkEvent x; memset (&x, 0, sizeof (x)); )

        * gtk/gtktreeview.c (gtk_tree_view_set_rows_drag_source): scratch
        g_closure_sink() warning.

        * gtk/gtktreemodel.c (gtk_tree_model_get_valist):
        * gtk/gtktreestore.c (gtk_tree_store_set_valist):
        * gtk/gtkliststore.c (gtk_list_store_set_valist):
        fix G_VALUE_COLLECT() and G_VALUE_LCOPY() calls.