message: cpu examples: DenseMatrix fix entries memory leak
diff: /*
  - Copyright (c) 2012, Intel Corporation
  + Copyright (c) 2012-2023, Intel Corporation
  All rights reserved.
  Redistribution and use in source and binary forms, with or without
  @@ -195,6 +195,10 @@ class DenseMatrix : public Matrix {
  memcpy(entries, content, size_r * size_c * sizeof(double));
  }
  + ~DenseMatrix() {
  + free(entries);
  + }
  +
  virtual void multiply(const Vector &v, Vector &r) const;
  double &operator()(unsigned int r, unsigned int c) { return *(entries + r * num_cols + c); }
  