[gtk] widget: Correct translate_coordinate documentation

[Timm Bäder <baedert src gnome org>]

commit 8720b2d8c51eb3c3f344f5e412eaf2b150da96fb
Author: Timm Bäder <mail baedert org>
Date:   Fri Feb 23 11:34:18 2018 +0100

    widget: Correct translate_coordinate documentation
    
    We write 0 to dest_x and dest_y nowadays if the two widgets do not have
    a common ancestor.

 gtk/gtkwidget.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index e5a857e767..bcd0294730 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -4752,7 +4752,7 @@ gtk_widget_get_origin_relative_to_parent (GtkWidget *widget,
  * operation, both widget must share a common toplevel.
  *
  * Returns: %FALSE if @src_widget and @dest_widget have no common
- *   ancestor. In this case, nothing is stored in
+ *   ancestor. In this case, 0 is stored in
  *   *@dest_x and *@dest_y. Otherwise %TRUE.
  **/
 gboolean