[gtk+] testgtk: Fix the test scrolling test

[Matthias Clasen <matthiasc src gnome org>]

commit e522ff05320a7bd23c97a1452d9a503f83b5a971
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jan 1 10:40:09 2018 -0500

    testgtk: Fix the test scrolling test
    
    We need to expand here, otherwise things look wrong.

 tests/testgtk.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/testgtk.c b/tests/testgtk.c
index d709e21..05257bc 100644
--- a/tests/testgtk.c
+++ b/tests/testgtk.c
@@ -7148,6 +7148,8 @@ create_scroll_test (GtkWidget *widget)
       scroll_test_pos = 0.0;
 
       drawing_area = gtk_drawing_area_new ();
+      gtk_widget_set_hexpand (drawing_area, TRUE);
+      gtk_widget_set_vexpand (drawing_area, TRUE);
       gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (drawing_area), 200);
       gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (drawing_area), 200);
       gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area),