Check return value from hash_table_find before using it as a pointer

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikk...@gmail.com>
---
 src/glsl/loop_analysis.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/glsl/loop_analysis.cpp b/src/glsl/loop_analysis.cpp
index d6a9ac7..5e4eaa1 100644
--- a/src/glsl/loop_analysis.cpp
+++ b/src/glsl/loop_analysis.cpp
@@ -589,7 +589,7 @@ get_basic_induction_increment(ir_assignment *ir, hash_table 
*var_hash)
         loop_variable *lv =
            (loop_variable *) hash_table_find(var_hash, inc_var);
 
-        if (!lv->is_loop_constant())
+      if (lv == NULL || !lv->is_loop_constant())
            inc = NULL;
       } else
         inc = NULL;
-- 
1.8.1.2

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