gnucash maint: Fix Travis failure.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/eec00c8a (commit)
	from  https://github.com/Gnucash/gnucash/commit/f1fe106d (commit)



commit eec00c8a3fbadaaf1874a6cd02e6f6cd3286ec6d
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon May 6 21:17:54 2019 -0700

    Fix Travis failure.



Summary of changes:
 gnucash/gnome-utils/gnc-cell-renderer-popup.c | 22 +++++++++++++---------
 gnucash/gnome/dialog-invoice.c                |  2 +-
 2 files changed, 14 insertions(+), 10 deletions(-)