gnucash maint: Warn against using xaccTransGetSplit for iteration.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/a93f3c19 (commit)
	from  https://github.com/Gnucash/gnucash/commit/e9a1d491 (commit)



commit a93f3c198d16306618a0f4fce764a4f8ab104cc7
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Jul 20 13:07:05 2020 -0700

    Warn against using xaccTransGetSplit for iteration.
    
    Instead of encouraging it.



Summary of changes:
 libgnucash/engine/Transaction.h | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)