message: features2d: fix BFMatcher.radiusMatch with HAMMING2
diff: @@ -958,7 +958,7 @@ void BFMatcher::radiusMatchImpl( InputArray _queryDescriptors, std::vector<std::
  Mat dist, distf;
  int iIdx, imgCount = (int)trainDescCollection.size();
  - int dtype = normType == NORM_HAMMING ||
  + int dtype = normType == NORM_HAMMING || normType == NORM_HAMMING2 ||
  (normType == NORM_L1 && queryDescriptors.type() == CV_8U) ? CV_32S : CV_32F;
  for( iIdx = 0; iIdx < imgCount; iIdx++ )
  