gnucash maint: builder must be g_object_unref'ed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/9f1c179f (commit)
	from  https://github.com/Gnucash/gnucash/commit/020f9a58 (commit)



commit 9f1c179fca746b5e4624b88f0aff0dd7d2d71cfb
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Thu Jun 3 14:08:25 2021 +0800

    builder must be g_object_unref'ed



Summary of changes:
 gnucash/gnome/dialog-invoice.c                                     | 1 +
 gnucash/gnome/dialog-price-edit-db.c                               | 1 +
 gnucash/import-export/customer-import/dialog-customer-import-gui.c | 1 +
 3 files changed, 3 insertions(+)