From 23a0aa7af252a7f19eb1528342a18d35748c2dbe Mon Sep 17 00:00:00 2001
From: Bertrand Lorentz <bertrand.lorentz@gmail.com>
Date: Sat, 2 Jul 2011 19:02:52 +0200
Subject: [PATCH] gtk: Fix crash in CellRenderer.OnGetSize callback

Handle the case when the native cell_area is not set.
---
 gtk/CellRenderer.custom | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gtk/CellRenderer.custom b/gtk/CellRenderer.custom
index 6a6b20b63..17e8f1d1b 100644
--- a/gtk/CellRenderer.custom
+++ b/gtk/CellRenderer.custom
@@ -54,7 +54,9 @@
 			try {
 				CellRenderer obj = GLib.Object.GetObject (item, false) as CellRenderer;
 				Gtk.Widget widg = GLib.Object.GetObject (widget, false) as Gtk.Widget;
-				Gdk.Rectangle cell_area = Gdk.Rectangle.New (cell_area_ptr);
+				Gdk.Rectangle cell_area = Gdk.Rectangle.Zero;
+				if (cell_area_ptr != IntPtr.Zero)
+					cell_area = Gdk.Rectangle.New (cell_area_ptr);
 				int a, b, c, d;
 
 				obj.OnGetSize (widg, ref cell_area, out a, out b, out c, out d);