[balsa/wip/gtk4] index: bindex->tree_view is the GtkTreeView

[Peter Bloomfield <peterb src gnome org>]

commit 89a586ff336c157017a3b6893fd90fd8b46d15cb
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Tue Dec 10 11:04:16 2019 -0500

    index: bindex->tree_view is the GtkTreeView
    
    not bindex itself, so do not cast BalsaIndex to GtkWidget

 src/balsa-index.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/balsa-index.c b/src/balsa-index.c
index a91d9ee1a..286d01898 100644
--- a/src/balsa-index.c
+++ b/src/balsa-index.c
@@ -2161,7 +2161,7 @@ bndx_do_popup(BalsaIndex     *bindex,
     if (event != NULL) {
         gtk_menu_popup_at_pointer(GTK_MENU(menu), event);
     } else {
-        gtk_menu_popup_at_widget(GTK_MENU(menu), GTK_WIDGET(bindex),
+        gtk_menu_popup_at_widget(GTK_MENU(menu), GTK_WIDGET(bindex->tree_view),
                                  GDK_GRAVITY_CENTER, GDK_GRAVITY_CENTER,
                                  NULL);
     }