gnucash maint: Fix travis failure.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/73d19360 (commit)
	from  https://github.com/Gnucash/gnucash/commit/710b122b (commit)



commit 73d193606e6de7bfcbfdbdfd3f5bd86b8bae2b86
Author: John Ralls <jralls at ceridwen.us>
Date:   Sun Nov 11 17:29:06 2018 +0900

    Fix travis failure.
    
    Linux needs stdint.h for INT64_MAX.



Summary of changes:
 libgnucash/engine/Scrub.c | 1 +
 1 file changed, 1 insertion(+)