From a69ab7e06b437ab75d68d886c45c3e06fd5828b0 Mon Sep 17 00:00:00 2001
From: Paul Cornett <paulcor@bullseye.com>
Date: Thu, 21 May 2009 17:58:40 +0000
Subject: [PATCH] fix crash when reparenting, #3900

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@60708 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/gtk/glcanvas.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gtk/glcanvas.cpp b/src/gtk/glcanvas.cpp
index 268079a7d6..c1af8372df 100644
--- a/src/gtk/glcanvas.cpp
+++ b/src/gtk/glcanvas.cpp
@@ -106,6 +106,8 @@ void wxGLContext::SetCurrent(const wxGLCanvas& win) const
     if (m_glContext)
     {
         GdkWindow *window = GTK_PIZZA(win.m_wxwindow)->bin_window;
+        if (window == NULL)
+            return;
 
         if (wxGLCanvas::GetGLXVersion() >= 13)
             // GLX >= 1.3