COMPMID-2177 Fix clang warnings

Change-Id: I4beacfd714ee3ed771fd174cce5d8009a2961380
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1065
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h b/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h
index 0d268ca..e21f463 100644
--- a/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h
+++ b/arm_compute/runtime/NEON/functions/NEHOGMultiDetection.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -91,12 +91,12 @@
 private:
     MemoryGroup                                                   _memory_group;
     NEHOGGradient                                                 _gradient_kernel;
-    std::unique_ptr<NEHOGOrientationBinningKernel[]>              _orient_bin_kernel;
-    std::unique_ptr<NEHOGBlockNormalizationKernel[]>              _block_norm_kernel;
-    std::unique_ptr<NEHOGDetector[]>                              _hog_detect_kernel;
+    std::vector<std::unique_ptr<NEHOGOrientationBinningKernel>>   _orient_bin_kernel;
+    std::vector<std::unique_ptr<NEHOGBlockNormalizationKernel>>   _block_norm_kernel;
+    std::vector<std::unique_ptr<NEHOGDetector>>                   _hog_detect_kernel;
     std::unique_ptr<CPPDetectionWindowNonMaximaSuppressionKernel> _non_maxima_kernel;
-    std::unique_ptr<Tensor[]>                                     _hog_space;
-    std::unique_ptr<Tensor[]>                                     _hog_norm_space;
+    std::vector<std::unique_ptr<Tensor>>                          _hog_space;
+    std::vector<std::unique_ptr<Tensor>>                          _hog_norm_space;
     IDetectionWindowArray                                        *_detection_windows;
     Tensor                                                        _mag;
     Tensor                                                        _phase;