gnucash maint: More OFX_INVBANKTRANS fixes.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/09b2533c (commit)
	from  https://github.com/Gnucash/gnucash/commit/09da6aa1 (commit)



commit 09b2533c0d61b1adeb21ca86e9e8e9a2152fa6ea
Author: John Ralls <jralls at ceridwen.us>
Date:   Thu Sep 23 12:03:08 2021 -0700

    More OFX_INVBANKTRANS fixes.
    
    Includes fixing broken build if libofx is < v 0.10.



Summary of changes:
 gnucash/import-export/ofx/gnc-ofx-import.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)