[gimp] app: fix gimp_test_utils_create_image_from_dialog()

[Michael Natterer <mitch src gnome org>]

commit a33fcfd43c6134d4ade37d4fa772f60a96a5ba4a
Author: Michael Natterer <mitch gimp org>
Date:   Sat May 26 12:40:53 2018 +0200

    app: fix gimp_test_utils_create_image_from_dialog()
    
    to reliably press the OK button. Makes tests fail a bit later.

 app/tests/gimp-app-test-utils.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/app/tests/gimp-app-test-utils.c b/app/tests/gimp-app-test-utils.c
index a5617e3f07..989b7b7806 100644
--- a/app/tests/gimp-app-test-utils.c
+++ b/app/tests/gimp-app-test-utils.c
@@ -311,10 +311,10 @@ gimp_test_utils_create_image_from_dialog (Gimp *gimp)
                                       "gimp-image-new-dialog",
                                       -1 /*view_size*/);
 
-  /* Press the focused widget, it should be the Ok button. It will
-   * take a while for the image to be created so loop for a while
+  /* Press the OK button. It will take a while for the image to be
+   * created so loop for a while
    */
-  gtk_widget_activate (gtk_window_get_focus (GTK_WINDOW (new_image_dialog)));
+  gtk_dialog_response (GTK_DIALOG (new_image_dialog), GTK_RESPONSE_OK);
   do
     {
       g_usleep (20 * 1000);