From e32a341be66391e0ea1cc6ce19bbd57997f46b6b Mon Sep 17 00:00:00 2001
From: Michel Dänzer <daenzer@vmware.com>
Date: Thu, 1 Oct 2009 16:45:11 +0200
Subject: st/xorg: Check that ms->api->destroy is not NULL before calling it.

Fixes potential crash on X server shutdown.
---
 src/gallium/state_trackers/xorg/xorg_driver.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/state_trackers/xorg/xorg_driver.c b/src/gallium/state_trackers/xorg/xorg_driver.c
index 8c4cba035a1..4bc87aa613d 100644
--- a/src/gallium/state_trackers/xorg/xorg_driver.c
+++ b/src/gallium/state_trackers/xorg/xorg_driver.c
@@ -726,8 +726,10 @@ CloseScreen(int scrnIndex, ScreenPtr pScreen)
     if (ms->exa)
 	xorg_exa_close(pScrn);
 
+    if (ms->api->destroy)
 	ms->api->destroy(ms->api);
-	ms->api = NULL;
+    ms->api = NULL;
+
     drmClose(ms->fd);
     ms->fd = -1;
 
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