From c8eb3b37380b9196718d29be759cfbda7e708b48 Mon Sep 17 00:00:00 2001
From: Robert Fewell <14uBobIT@gmail.com>
Date: Thu, 9 Jan 2020 14:59:53 +0000
Subject: [PATCH] Bug 797550 - Crash when changing register tab position

Check for a valid GNC_MAIN_WINDOW being passed to
gnc_main_window_update_tab_position before trying to update tabs
---
 gnucash/gnome-utils/gnc-main-window.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gnucash/gnome-utils/gnc-main-window.c b/gnucash/gnome-utils/gnc-main-window.c
index 3d85d7f1af..1372142d65 100644
--- a/gnucash/gnome-utils/gnc-main-window.c
+++ b/gnucash/gnome-utils/gnc-main-window.c
@@ -3285,6 +3285,8 @@ gnc_main_window_update_tab_position (gpointer prefs, gchar *pref, gpointer user_
     GtkPositionType position = GTK_POS_TOP;
     GncMainWindowPrivate *priv;
 
+    g_return_if_fail (GNC_IS_MAIN_WINDOW(user_data));
+
     window = GNC_MAIN_WINDOW(user_data);
 
     ENTER ("window %p", window);