gnucash maint: typo fix edd7efd95 book->!book bail out

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/58a08a01 (commit)
	from  https://github.com/Gnucash/gnucash/commit/ae04d671 (commit)



commit 58a08a01251f9d904439cfb2b8325dc599f51f40
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sat Jul 11 12:48:46 2020 +0800

    typo fix edd7efd95 book->!book bail out



Summary of changes:
 gnucash/gnome/gnc-plugin-page-register.c  | 2 +-
 gnucash/gnome/gnc-plugin-page-register2.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)