arm_compute v18.02

Change-Id: I7207aa488e5470f235f39b6c188b4678dc38d1a6
diff --git a/src/runtime/CL/functions/CLEqualizeHistogram.cpp b/src/runtime/CL/functions/CLEqualizeHistogram.cpp
index 3b182d3..45f70d2 100644
--- a/src/runtime/CL/functions/CLEqualizeHistogram.cpp
+++ b/src/runtime/CL/functions/CLEqualizeHistogram.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -68,7 +68,7 @@
     }
     else
     {
-        const float diff = image_size - num_lowest_pixels;
+        const float diff = image_size - 1;
 
         for(size_t i = 0; i < 256; ++i)
         {