[gtk] popover menu: Fix a parameter name mismatch

[Matthias Clasen <matthiasc src gnome org>]

commit eaae9650d97abca29f044a370383194542ab8fb7
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Mar 28 18:27:42 2019 -0400

    popover menu: Fix a parameter name mismatch

 gtk/gtkpopovermenu.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkpopovermenu.h b/gtk/gtkpopovermenu.h
index bf041b02ea..01825c1491 100644
--- a/gtk/gtkpopovermenu.h
+++ b/gtk/gtkpopovermenu.h
@@ -54,7 +54,7 @@ GtkWidget * gtk_popover_menu_new      (void);
 
 GDK_AVAILABLE_IN_ALL
 void        gtk_popover_menu_add_submenu (GtkPopoverMenu *popover,
-                                          GtkWidget      *menu,
+                                          GtkWidget      *submenu,
                                           const char     *name);
 GDK_AVAILABLE_IN_ALL
 void        gtk_popover_menu_open_submenu (GtkPopoverMenu *popover,