Mesa (master): clover: Fix up NULL constant pointer arguments.

[Francisco Jerez]

Module: Mesa
Branch: master
Commit: 198cd136b94b2ddfb8e2d50e567f3e391eb93915
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=198cd136b94b2ddfb8e2d50e567f3e391eb93915

Author: Francisco Jerez <currojerez at riseup.net>
Date:   Sun Feb 16 19:35:11 2014 +0100

clover: Fix up NULL constant pointer arguments.

Tested-by: Tom Stellard <thomas.stellard at amd.com>

---

 src/gallium/state_trackers/clover/core/kernel.cpp |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/state_trackers/clover/core/kernel.cpp b/src/gallium/state_trackers/clover/core/kernel.cpp
index 6d894cd..fa9453b 100644
--- a/src/gallium/state_trackers/clover/core/kernel.cpp
+++ b/src/gallium/state_trackers/clover/core/kernel.cpp
@@ -411,7 +411,8 @@ kernel::constant_argument::bind(exec_context &ctx,
 
 void
 kernel::constant_argument::unbind(exec_context &ctx) {
-   buf->resource(*ctx.q).unbind_surface(*ctx.q, st);
+   if (buf)
+      buf->resource(*ctx.q).unbind_surface(*ctx.q, st);
 }
 
 void