COMPMID-556: Fix dangling references in NEFillBorder

Change-Id: I29d8406514d5d51742df955059ee6500ca9ea3dd
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/112234
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: BSG Visual Compute Jenkins server to access repositories on http://mpd-gerrit.cambridge.arm.com <bsgcomp@arm.com>
diff --git a/tests/validation/reference/HarrisCornerDetector.cpp b/tests/validation/reference/HarrisCornerDetector.cpp
index 12afd95..442f6a1 100644
--- a/tests/validation/reference/HarrisCornerDetector.cpp
+++ b/tests/validation/reference/HarrisCornerDetector.cpp
@@ -99,9 +99,9 @@
         float Gxy = 0.f;
 
         // Calculate Gx^2, Gy^2 and Gxy within the given window
-        for(int y = src_coord.y() - block_size / 2; y <= src_coord.y() + block_size / 2; ++y)
+        for(int y = block_top_left.y(); y <= block_bottom_right.y(); ++y)
         {
-            for(int x = src_coord.x() - block_size / 2; x <= src_coord.x() + block_size / 2; ++x)
+            for(int x = block_top_left.x(); x <= block_bottom_right.x(); ++x)
             {
                 Coordinates block_coord(x, y);
 
@@ -139,7 +139,7 @@
     {
         Coordinates coord = index2coord(suppressed_scores.shape(), i);
 
-        if(is_in_valid_region(suppressed_scores_region, coord) && suppressed_scores[i] > 0.f)
+        if(is_in_valid_region(suppressed_scores_region, coord) && suppressed_scores[i] != 0.f)
         {
             KeyPoint corner;
             corner.x               = coord.x();