[gnome-font-viewer/wip/ewlsh/gtk4] font-view: Don't cast header as GtkHeaderBar for `set_titlebar ()`

[Christopher Davis <christopherdavis src gnome org>]

commit 47b29ef3de42c2f9dfb47719de964cfd76a17032
Author: Christopher Davis <christopherdavis gnome org>
Date:   Fri Feb 11 17:03:51 2022 -0800

    font-view: Don't cast header as GtkHeaderBar for `set_titlebar ()`
    
    This function takes a GtkWidget*, not a GtkHeaderBar*.

 src/font-view.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/src/font-view.c b/src/font-view.c
index 8690a66..f162567 100644
--- a/src/font-view.c
+++ b/src/font-view.c
@@ -1284,8 +1284,7 @@ ensure_window (FontViewApplication *self)
                                     GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
     gtk_stack_add_named (GTK_STACK (self->stack), swin, "info");
 
-    gtk_window_set_titlebar (GTK_WINDOW (window),
-                             GTK_HEADER_BAR (self->header));
+    gtk_window_set_titlebar (GTK_WINDOW (window), self->header);
     gtk_window_present (GTK_WINDOW (window));
 }