MLCE-13: Sanitizing matrix argument in the Warp.

This changes help to prevent errors like passing a matrix
with less elements than required into the warp functions.

Change-Id: I863f933a5e0568258717cffed3a20788d3d03083
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/143044
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/tests/validation/CL/WarpAffine.cpp b/tests/validation/CL/WarpAffine.cpp
index 7f3001c..29f24cc 100644
--- a/tests/validation/CL/WarpAffine.cpp
+++ b/tests/validation/CL/WarpAffine.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 ARM Limited.
+ * Copyright (c) 2017-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -65,8 +65,8 @@
     uint8_t                                constant_border_value = distribution_u8(gen);
 
     // Create the matrix
-    std::array<float, 6> matrix{ {} };
-    fill_warp_matrix<6>(matrix);
+    std::array<float, 9> matrix{ {} };
+    fill_warp_matrix<9>(matrix);
 
     // Create tensors
     CLTensor src = create_tensor<CLTensor>(shape, data_type);
@@ -77,7 +77,7 @@
 
     // Create and configure function
     CLWarpAffine warp_affine;
-    warp_affine.configure(&src, &dst, matrix.data(), policy, border_mode, constant_border_value);
+    warp_affine.configure(&src, &dst, matrix, policy, border_mode, constant_border_value);
 
     // Validate valid region
     const ValidRegion valid_region = shape_to_valid_region(shape);