COMPMID-959: Fix valid region for Scale

Change-Id: Ic9ce52d772a178916dfa60fbb6456d295c06b83d
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/122647
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/src/core/GLES_COMPUTE/kernels/GCScaleKernel.cpp b/src/core/GLES_COMPUTE/kernels/GCScaleKernel.cpp
index 46d7ff9..f87615a 100644
--- a/src/core/GLES_COMPUTE/kernels/GCScaleKernel.cpp
+++ b/src/core/GLES_COMPUTE/kernels/GCScaleKernel.cpp
@@ -51,7 +51,6 @@
     ARM_COMPUTE_ERROR_ON_MISMATCHING_DATA_TYPES(input, output);
     ARM_COMPUTE_ERROR_ON(output == input);
     ARM_COMPUTE_ERROR_ON(policy != InterpolationPolicy::NEAREST_NEIGHBOR);
-    ARM_COMPUTE_UNUSED(sampling_policy);
 
     _input  = input;
     _output = output;
@@ -123,7 +122,7 @@
     output_access.set_valid_region(win, calculate_valid_region_scale(*(input->info()),
                                                                      output->info()->tensor_shape(),
                                                                      policy,
-                                                                     border,
+                                                                     sampling_policy,
                                                                      border_undefined));
 
     IGCKernel::configure(win);