gnucash maint: Fix typo in guile variable names in 1373233cd

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/189db58e (commit)
	from  https://github.com/Gnucash/gnucash/commit/5388cc8e (commit)



commit 189db58e695c090b410a3f2fcbaeff090344a7fc
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sun Mar 20 12:08:41 2022 +0800

    Fix typo in guile variable names in 1373233cd



Summary of changes:
 bindings/guile/engine.scm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)