gnucash maint: Fix use-after-free crash in gnc_set_busy_cursor.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/0d0ab002 (commit)
	from  https://github.com/Gnucash/gnucash/commit/70abdbd1 (commit)



commit 0d0ab002f5c817253940b96532cdd1847314976c
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Aug 29 12:47:38 2022 -0700

    Fix use-after-free crash in gnc_set_busy_cursor.



Summary of changes:
 gnucash/gnome-utils/cursors.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)