gnucash maint: Fix Windows build.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/c210ceb3 (commit)
	from  https://github.com/Gnucash/gnucash/commit/98c8b233 (commit)



commit c210ceb3cbfa422effe2a33f8b87d8f6887943ca
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Aug 22 12:59:14 2020 -0700

    Fix Windows build.
    
    MinGW doesn't implement strsep, use strtok instead.



Summary of changes:
 gnucash/gnome/business-urls.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)