From b53659452ccdf33df4bae77d142a86525d5db779 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel@tungstengraphics.com>
Date: Tue, 10 Jul 2007 10:49:28 +0200
Subject: [PATCH] Clear pointers to freed cliprects.

Not doing this could lead to double frees under rare circumstances.
---
 src/mesa/drivers/dri/common/dri_util.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index 07ac4c7cd5f..25d32894dc8 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -428,10 +428,12 @@ __driUtilUpdateDrawableInfo(__DRIdrawablePrivate *pdp)
 
     if (pdp->pClipRects) {
 	_mesa_free(pdp->pClipRects); 
+	pdp->pClipRects = NULL;
     }
 
     if (pdp->pBackClipRects) {
 	_mesa_free(pdp->pBackClipRects); 
+	pdp->pBackClipRects = NULL;
     }
 
     DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID);