[gtk+] Expand the docs for gtk_window_set_default_size()

[Matthias Clasen <matthiasc src gnome org>]

commit 4e2674edbb155163d0d50c8ccc19e88428cd8cd4
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Feb 15 08:23:12 2016 -0500

    Expand the docs for gtk_window_set_default_size()
    
    Mention that this function should be used together with
    gtk_window_get_size() when saving and restoring window sizes.

 gtk/gtkwindow.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index c2a83e0..4b686a1 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -5184,7 +5184,7 @@ gtk_window_set_default_size_internal (GtkWindow    *window,
  * geometry hints for the window (gtk_window_set_geometry_hints() can
  * be used to set these explicitly), the default size will be clamped
  * to the nearest permitted size.
- * 
+ *
  * Unlike gtk_widget_set_size_request(), which sets a size request for
  * a widget and thus would keep users from shrinking the window, this
  * function only sets the initial size, just as if the user had
@@ -5206,7 +5206,12 @@ gtk_window_set_default_size_internal (GtkWindow    *window,
  *
  * Windows can’t actually be 0x0 in size, they must be at least 1x1, but
  * passing 0 for @width and @height is OK, resulting in a 1x1 default size.
- **/
+ *
+ * If you use this function to reestablish a previously saved window size,
+ * note that the appropriate size to save is the one returned by
+ * gtk_window_get_size(). Using the window allocation directly will not
+ * work in all circumstances and can lead to growing or shrinking windows.
+ */
 void       
 gtk_window_set_default_size (GtkWindow   *window,
                             gint         width,