gnucash stable: Redo 71afa3e0 and 71afa3e0 so powten(max_leg_digits) is 1e18

[Mike Alexander]

Updated	 via  https://github.com/Gnucash/gnucash/commit/6bdaa161 (commit)
	from  https://github.com/Gnucash/gnucash/commit/369b0855 (commit)



commit 6bdaa161eb05597d949df321a100482e86a866eb
Author: Mike Alexander <mta at umich.edu>
Date:   Mon May 22 15:24:26 2023 -0400

    Redo 71afa3e0 and 71afa3e0 so powten(max_leg_digits) is 1e18
    
    This is what it was before 71afa3e0.  This is the largest power of
    ten that fits in an int64.



Summary of changes:
 libgnucash/engine/gnc-numeric.cpp            |  7 ++++---
 libgnucash/engine/test/gtest-gnc-numeric.cpp | 12 ++++++------
 2 files changed, 10 insertions(+), 9 deletions(-)