[gtk+] sizerequest: Make invisible widgets return a 0x0 size.

[Benjamin Otte <otte src gnome org>]

commit da100207b3c5437ea8928a0043e75af8aa4ed936
Author: Benjamin Otte <otte redhat com>
Date:   Tue Jan 8 12:26:04 2013 +0100

    sizerequest: Make invisible widgets return a 0x0 size.

 gtk/gtksizerequest.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtksizerequest.c b/gtk/gtksizerequest.c
index 7ad9439..4d54821 100644
--- a/gtk/gtksizerequest.c
+++ b/gtk/gtksizerequest.c
@@ -268,6 +268,15 @@ _gtk_widget_compute_size_for_orientation (GtkWidget        *widget,
   gpointer key;
   gint    min_result = 0, nat_result = 0;
 
+  if (!gtk_widget_get_visible (widget))
+    {
+      if (minimum)
+        *minimum = 0;
+      if (natural)
+        *natural = 0;
+      return;
+    }
+
   if (G_LIKELY (!_gtk_widget_get_sizegroups (widget)))
     {
       gtk_widget_query_size_for_orientation (widget, orientation, for_size, minimum, natural);