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/src/runtime/CL/tuners/CLLWSList.cpp b/src/runtime/CL/tuners/CLLWSList.cpp
index 97134b1..6eb2514 100644
--- a/src/runtime/CL/tuners/CLLWSList.cpp
+++ b/src/runtime/CL/tuners/CLLWSList.cpp
@@ -36,7 +36,7 @@
 {
     ARM_COMPUTE_ERROR_ON(index >= size());
     auto coords = index2coords(search_space_shape, index);
-    return cl::NDRange(coords[0] + 1, coords[1] + 1, coords[2] + 1);
+    return cl::NDRange{ coords[0] + 1U, coords[1] + 1U, coords[2] + 1U };
 }
 
 CLLWSListExhaustive::CLLWSListExhaustive(const cl::NDRange &gws)
@@ -49,7 +49,7 @@
 {
     ARM_COMPUTE_ERROR_ON(index >= size());
     auto coords = index2coords(search_space_shape, index);
-    return cl::NDRange(_lws_x[coords[0]], _lws_y[coords[1]], _lws_z[coords[2]]);
+    return cl::NDRange{ _lws_x[coords[0]], _lws_y[coords[1]], _lws_z[coords[2]] };
 }
 
 CLLWSListNormal::CLLWSListNormal(const cl::NDRange &gws)