COMPMID-2177 Fix clang warnings

Change-Id: I78039db8c58d7b14a042c41e54c25fb9cb509bf7
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1092
Reviewed-by: VidhyaSudhan Loganathan <vidhyasudhan.loganathan@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/validation/reference/ArithmeticDivision.cpp b/tests/validation/reference/ArithmeticDivision.cpp
index 0102231..0ced439 100644
--- a/tests/validation/reference/ArithmeticDivision.cpp
+++ b/tests/validation/reference/ArithmeticDivision.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -77,7 +77,9 @@
 {
     SimpleTensor<T> dst(TensorShape::broadcast_shape(src1.shape(), src2.shape()), data_type);
 
-    Coordinates id_src1, id_src2, id_dst;
+    Coordinates id_src1{};
+    Coordinates id_src2{};
+    Coordinates id_dst{};
 
     BroadcastUnroll<Coordinates::num_max_dimensions>::unroll(src1, src2, dst, id_src1, id_src2, id_dst);