From dd1a9f75dc1d29e3383f27aaa1cf024c83e5c8e2 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Thu, 25 Aug 2005 14:07:06 +0000
Subject: [PATCH] fix segfault in Fake_glXCreatePBuffer(), bug 4235

---
 src/mesa/drivers/x11/fakeglx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/x11/fakeglx.c b/src/mesa/drivers/x11/fakeglx.c
index 2cce27d21cc..d3213e70898 100644
--- a/src/mesa/drivers/x11/fakeglx.c
+++ b/src/mesa/drivers/x11/fakeglx.c
@@ -2099,7 +2099,10 @@ Fake_glXCreatePbuffer( Display *dpy, GLXFBConfig config,
    /* A GLXPbuffer handle must be an X Drawable because that's what
     * glXMakeCurrent takes.
     */
-   return (GLXPbuffer) xmbuf->frontxrb->pixmap;
+   if (xmbuf)
+      return (GLXPbuffer) xmbuf->frontxrb->pixmap;
+   else
+      return 0;
 }
 
 
-- 
2.30.2