gnucash maint: Bug 773808 - Export Report Crash

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/ad208810 (commit)
	from  https://github.com/Gnucash/gnucash/commit/ad1ba561 (commit)



commit ad208810f0313f111529e1605f72adf32b68b57f
Author: John Ralls <jralls at ceridwen.us>
Date:   Sun Dec 11 09:58:54 2016 -0800

    Bug 773808 - Export Report Crash
    
    It's possible for the GtkFileChooserDialog to return a NULL filename,
    so defend against that.



Summary of changes:
 src/gnome-utils/gnc-file.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)