gnucash stable: Revert "[gnc-pricedb.cpp] use std::pair instead of a struct for PriceTuple"

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/d8954456 (commit)
	from  https://github.com/Gnucash/gnucash/commit/d2e0ccfe (commit)



commit d89544563dddec65173727f689a6a53bcc5a6556
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sat Aug 5 11:02:57 2023 +0800

    Revert "[gnc-pricedb.cpp] use std::pair instead of a struct for PriceTuple"
    
    This reverts commit 2d730e38d5aa4c1f54c658636c9b0f671dcc21e4.



Summary of changes:
 libgnucash/engine/gnc-pricedb.cpp | 35 ++++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 13 deletions(-)