gnucash master: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/09a8bee5 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/8ea9e411 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/a3dae3bd (commit)
	from  https://github.com/Gnucash/gnucash/commit/ecf429a4 (commit)



commit 09a8bee5c0a38dbd8bee9d3d1185f1d54df5b34e
Merge: 8ea9e4119 a3dae3bd4
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Thu May 14 20:30:08 2020 +0800

    Merge branch 'speedup-aging' #638

commit 8ea9e411904d12c7f83ebb0752e7b3424f9867bd
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Thu May 14 19:47:07 2020 +0800

    [register] display $0.00 for zero-value splits

commit a3dae3bd4dea908b9e90e49f02e241d765ba2996
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Mon Jan 20 23:20:57 2020 +0800

    [gnc-lot.c] speed up gncInvoiceGetInvoiceFromLot by caching invoice



Summary of changes:
 gnucash/report/reports/standard/register.scm           |  2 +-
 gnucash/report/reports/standard/test/test-register.scm | 16 ++++++++--------
 libgnucash/engine/gnc-lot.c                            | 16 ++++++++++++++++
 libgnucash/engine/gnc-lot.h                            |  7 +++++++
 libgnucash/engine/gncInvoice.c                         | 16 ++++++++++++----
 5 files changed, 44 insertions(+), 13 deletions(-)