Fixes a regression added by bb5aeb854915ba67abc56257f830d002c956439e.

Signed-off-by: Samuel Iglesias Gonsalvez <sigles...@igalia.com>
---

Piglit test that checks the regression:
  http://patchwork.freedesktop.org/patch/62183/ 

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

diff --git a/src/glsl/lower_ubo_reference.cpp b/src/glsl/lower_ubo_reference.cpp
index 1fbb09d..7dcbe15 100644
--- a/src/glsl/lower_ubo_reference.cpp
+++ b/src/glsl/lower_ubo_reference.cpp
@@ -284,7 +284,7 @@ interface_field_name(void *mem_ctx, char *base_name, 
ir_rvalue *d,
             if (array_index->type != glsl_type::uint_type)
                array_index = i2u(array_index);
 
-            if (a->array->type->fields.array->is_array()) {
+            if (a->array->type->is_array() && 
a->array->type->fields.array->is_array()) {
                ir_constant *base_size = new(mem_ctx)
                   
ir_constant(a->array->type->fields.array->arrays_of_arrays_size());
                array_index = mul(array_index, base_size);
-- 
2.1.4

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