gnucash maint: Fix build of jenny.c on 32-bit builds, mingw-w64.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/93f3a8ea (commit)
	from  https://github.com/Gnucash/gnucash/commit/54a5097c (commit)



commit 93f3a8ea8274862f776ed836ac99b50ea118a827
Author: John Ralls <jralls at ceridwen.us>
Date:   Thu Aug 23 11:49:49 2018 -0700

    Fix build of jenny.c on 32-bit builds, mingw-w64.



Summary of changes:
 borrowed/jenny/jenny.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)