gnucash stable: [balance-forecast] optimise some loops

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/811ebf55 (commit)
	from  https://github.com/Gnucash/gnucash/commit/8bd2d10c (commit)



commit 811ebf5505fc3e354053c78699351feea7a507f7
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Mon May 5 19:03:22 2025 +0800

    [balance-forecast] optimise some loops
    
    fewer temporary lists and gc



Summary of changes:
 gnucash/report/reports/standard/balance-forecast.scm | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)