layers: Fix compile error due to missing math.h
diff --git a/layers/parameter_validation_utils.cpp b/layers/parameter_validation_utils.cpp
index 97adf24..cfb82a3 100644
--- a/layers/parameter_validation_utils.cpp
+++ b/layers/parameter_validation_utils.cpp
@@ -1,7 +1,7 @@
-/* Copyright (c) 2015-2018 The Khronos Group Inc.
- * Copyright (c) 2015-2018 Valve Corporation
- * Copyright (c) 2015-2018 LunarG, Inc.
- * Copyright (C) 2015-2018 Google Inc.
+/* Copyright (c) 2015-2019 The Khronos Group Inc.
+ * Copyright (c) 2015-2019 Valve Corporation
+ * Copyright (c) 2015-2019 LunarG, Inc.
+ * Copyright (C) 2015-2019 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -20,6 +20,9 @@
*/
#define NOMINMAX
+
+#include <math.h>
+
#include "chassis.h"
#include "stateless_validation.h"