Mesa (gallium-0.2): wgl: Fix null pointer reference.

[Jose Fonseca]

Module: Mesa
Branch: gallium-0.2
Commit: 67e988a06c8ff5896da9df7ce1c7fc118352c8a3
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=67e988a06c8ff5896da9df7ce1c7fc118352c8a3

Author: José Fonseca <jfonseca at vmware.com>
Date:   Tue Feb 10 11:50:54 2009 +0000

wgl: Fix null pointer reference.

---

 src/gallium/state_trackers/wgl/icd/stw_icd.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/gallium/state_trackers/wgl/icd/stw_icd.c b/src/gallium/state_trackers/wgl/icd/stw_icd.c
index 5c78c19..8fa9f4e 100644
--- a/src/gallium/state_trackers/wgl/icd/stw_icd.c
+++ b/src/gallium/state_trackers/wgl/icd/stw_icd.c
@@ -89,6 +89,9 @@ lookup_context( DHGLRC dhglrc )
        dhglrc >= DRV_CONTEXT_MAX)
       return NULL;
 
+   if(!stw_icd)
+      return NULL;
+
    return stw_icd->ctx_array[dhglrc - 1].ctx;
 }