gnucash maint: gtk_tree_model_get will allocate char* which must be g_freed.

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/e30c1fce (commit)
	from  https://github.com/Gnucash/gnucash/commit/aedc0cc1 (commit)



commit e30c1fce70c04fab4507ac869351165b0d70ae48
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Thu Nov 10 21:54:17 2022 +0800

    gtk_tree_model_get will allocate char* which must be g_freed.



Summary of changes:
 gnucash/gnome/dialog-imap-editor.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)