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/NEOpticalFlow.h b/arm_compute/runtime/NEON/functions/NEOpticalFlow.h
index ad703f0..320247d 100644
--- a/arm_compute/runtime/NEON/functions/NEOpticalFlow.h
+++ b/arm_compute/runtime/NEON/functions/NEOpticalFlow.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 ARM Limited.
+ * Copyright (c) 2016-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -86,17 +86,17 @@
     void run() override;
 
 private:
-    MemoryGroup                          _memory_group;
-    std::unique_ptr<NEScharr3x3[]>       _func_scharr;
-    std::unique_ptr<NELKTrackerKernel[]> _kernel_tracker;
-    std::unique_ptr<Tensor[]>            _scharr_gx;
-    std::unique_ptr<Tensor[]>            _scharr_gy;
-    IKeyPointArray                      *_new_points;
-    const IKeyPointArray                *_new_points_estimates;
-    const IKeyPointArray                *_old_points;
-    LKInternalKeypointArray              _new_points_internal;
-    LKInternalKeypointArray              _old_points_internal;
-    unsigned int                         _num_levels;
+    MemoryGroup                                     _memory_group;
+    std::vector<std::unique_ptr<NEScharr3x3>>       _func_scharr;
+    std::vector<std::unique_ptr<NELKTrackerKernel>> _kernel_tracker;
+    std::vector<std::unique_ptr<Tensor>>            _scharr_gx;
+    std::vector<std::unique_ptr<Tensor>>            _scharr_gy;
+    IKeyPointArray                                 *_new_points;
+    const IKeyPointArray                           *_new_points_estimates;
+    const IKeyPointArray                           *_old_points;
+    LKInternalKeypointArray                         _new_points_internal;
+    LKInternalKeypointArray                         _old_points_internal;
+    unsigned int                                    _num_levels;
 };
 }
 #endif /*__ARM_COMPUTE_NEOPTICALFLOW_H__ */