gnucash maint: Use original guile variable names changed in #1073

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/cf128250 (commit)
	from  https://github.com/Gnucash/gnucash/commit/189db58e (commit)



commit cf1282501e8d6c5c2d59fcb1c8d34456833c244c
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sun Mar 20 12:26:26 2022 +0800

    Use original guile variable names changed in #1073
    
    The changes 09296dfb96, 1373233cd0 and 189db58e6 had caused
    inconsistencies. Best restore original guile variable names using
    underscore, bound to strings instead of functions returning strings.



Summary of changes:
 bindings/guile/engine.scm                          | 4 ++--
 gnucash/import-export/qif-imp/qif-dialog-utils.scm | 6 +++---
 gnucash/import-export/qif-imp/qif-to-gnc.scm       | 2 +-
 libgnucash/app-utils/options.scm                   | 6 +++---
 4 files changed, 9 insertions(+), 9 deletions(-)