[gimp] app: gimp_file_dialog_get_default_folder() must return a value.

[Jehan Pagès <jehanp src gnome org>]

commit d1e2b2c1621543c20e11a20f96ec62cc6ecfc5bf
Author: Jehan <jehan girinstud io>
Date:   Tue Sep 8 23:59:13 2015 +0200

    app: gimp_file_dialog_get_default_folder() must return a value.
    
    Oups!

 app/widgets/gimpfiledialog.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/widgets/gimpfiledialog.c b/app/widgets/gimpfiledialog.c
index 10390de..b83eebf 100644
--- a/app/widgets/gimpfiledialog.c
+++ b/app/widgets/gimpfiledialog.c
@@ -635,7 +635,7 @@ gimp_file_dialog_set_file_proc (GimpFileDialog      *dialog,
 GFile *
 gimp_file_dialog_get_default_folder (GimpFileDialog *dialog)
 {
-  g_return_if_fail (GIMP_IS_FILE_DIALOG (dialog));
+  g_return_val_if_fail (GIMP_IS_FILE_DIALOG (dialog), NULL);
 
   GIMP_FILE_DIALOG_GET_CLASS (dialog)->get_default_folder (dialog);
 }