Mesa (master): glsl: fix warning in release build

[Ian Romanick]

Module: Mesa
Branch: master
Commit: bbeb9ab2f71409aad47485e7a1b8900f6839a481
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=bbeb9ab2f71409aad47485e7a1b8900f6839a481

Author: Grazvydas Ignotas <notasas at gmail.com>
Date:   Sat Apr 16 04:00:11 2016 +0300

glsl: fix warning in release build

Mark variable MAYBE_UNUSED to avoid unused-but-set-variable warning in
release build.

Signed-off-by: Grazvydas Ignotas <notasas at gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>

---

 src/compiler/glsl/lower_buffer_access.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/glsl/lower_buffer_access.cpp b/src/compiler/glsl/lower_buffer_access.cpp
index f85b421..59a2ae8 100644
--- a/src/compiler/glsl/lower_buffer_access.cpp
+++ b/src/compiler/glsl/lower_buffer_access.cpp
@@ -283,7 +283,7 @@ lower_buffer_access::is_dereferenced_thing_row_major(const ir_rvalue *deref)
              * layouts at HIR generation time, but we don't do that for shared
              * variables, which are always column-major
              */
-            ir_variable *var = deref->variable_referenced();
+            MAYBE_UNUSED ir_variable *var = deref->variable_referenced();
             assert((var->is_in_buffer_block() && !matrix) ||
                    var->data.mode == ir_var_shader_shared);
             return false;