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/NEON/NonLinearFilter.cpp b/tests/validation/NEON/NonLinearFilter.cpp
index b3d4c93..08ad1e2 100644
--- a/tests/validation/NEON/NonLinearFilter.cpp
+++ b/tests/validation/NEON/NonLinearFilter.cpp
@@ -52,8 +52,8 @@
     const uint8_t                          constant_border_value = distribution_u8(generator);
 
     // Create the mask
-    uint8_t mask[mask_size * mask_size];
-    fill_mask_from_pattern(mask, mask_size, mask_size, pattern);
+    std::vector<uint8_t> mask(mask_size * mask_size);
+    fill_mask_from_pattern(mask.data(), mask_size, mask_size, pattern);
     const auto half_mask_size = static_cast<int>(mask_size / 2);
 
     // Create tensors
@@ -65,7 +65,7 @@
 
     // Create and configure function
     NENonLinearFilter filter;
-    filter.configure(&src, &dst, function, mask_size, pattern, mask, border_mode, constant_border_value);
+    filter.configure(&src, &dst, function, mask_size, pattern, mask.data(), border_mode, constant_border_value);
 
     // Validate valid region
     const ValidRegion dst_valid_region = shape_to_valid_region(shape, border_mode == BorderMode::UNDEFINED, BorderSize(half_mask_size));