The height of the window is not used here. Passing NULL to
gtk_window_get_default_size() is allowed. [1]

[1]: https://gitlab.gnome.org/GNOME/gtk/-/blob/2.24.33/gtk/gtkwindow.c#L3974

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 scripts/kconfig/gconf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/kconfig/gconf.c b/scripts/kconfig/gconf.c
index 2ab000adcced..c78eded5c01b 100644
--- a/scripts/kconfig/gconf.c
+++ b/scripts/kconfig/gconf.c
@@ -673,10 +673,10 @@ void on_single_clicked(GtkButton * button, gpointer user_data)
 
 void on_split_clicked(GtkButton * button, gpointer user_data)
 {
-	gint w, h;
+	gint w;
 	view_mode = SPLIT_VIEW;
 	gtk_widget_show(tree1_w);
-	gtk_window_get_default_size(GTK_WINDOW(main_wnd), &w, &h);
+	gtk_window_get_default_size(GTK_WINDOW(main_wnd), &w, NULL);
 	gtk_paned_set_position(GTK_PANED(hpaned), w / 2);
 	gtk_tree_store_clear(tree2);
 	display_list();
-- 
2.43.0