gnucash maint: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/80230650 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/96a6e1b0 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/d6c5b115 (commit)
	from  https://github.com/Gnucash/gnucash/commit/6939945f (commit)



commit 802306503057a8f4476acc830eaa0e1f777e4c86
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Tue Apr 21 11:39:40 2020 +0800

    [fin.scm] return #f instead of -1 if n is out of range

commit 96a6e1b0d5be311bfb2ba0c8213e42d04fb40205
Merge: 6939945fc d6c5b115d
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Tue Apr 21 11:39:28 2020 +0800

    Merge branch 'patch-1' of git://github.com/thetedmunds/gnucash into maint

commit d6c5b115d836f0345f928141381dd53eec554888
Author: thetedmunds <49656923+thetedmunds at users.noreply.github.com>
Date:   Tue Apr 14 07:45:54 2020 -0700

    Adding lines missing from fix for Bug 797196
    
    Adding definition of gnc:amort_balance() that got lost in the original pull-request for Bug 797196.



Summary of changes:
 libgnucash/app-utils/fin.scm | 46 +++++++++++++++++++++++++++++---------------
 1 file changed, 30 insertions(+), 16 deletions(-)