message: Resolve Make randomly generated colours opaque.
diff: @@ -117,7 +117,7 @@ void drawKeypoints( InputArray image, const std::vector<KeyPoint>& keypoints, In
  end = keypoints.end();
  for( ; it != end; ++it )
  {
  - Scalar color = isRandColor ? Scalar(rng(256), rng(256), rng(256)) : _color;
  + Scalar color = isRandColor ? Scalar( rng(256), rng(256), rng(256), 255 ) : _color;
  _drawKeypoint( outImage, *it, color, flags );
  }
  }
  @@ -173,7 +173,7 @@ static inline void _drawMatch( InputOutputArray outImg, InputOutputArray outImg1
  {
  RNG& rng = theRNG();
  bool isRandMatchColor = matchColor == Scalar::all(-1);
  - Scalar color = isRandMatchColor ? Scalar( rng(256), rng(256), rng(256) ) : matchColor;
  + Scalar color = isRandMatchColor ? Scalar( rng(256), rng(256), rng(256), 255 ) : matchColor;
  _drawKeypoint( outImg1, kp1, color, flags );
  _drawKeypoint( outImg2, kp2, color, flags );
  