message: core: workaround transform() inplace calls
diff: @@ -442,6 +442,12 @@ void transform(InputArray _src, OutputArray _dst, InputArray _mtx)
  _dst.create( src.size(), CV_MAKETYPE(depth, dcn) );
  Mat dst = _dst.getMat();
  + if (src.data == dst.data) // inplace case
  + {
  + CV_Assert(scn == dcn);
  + src = src.clone(); // TODO Add performance warning
  + }
  +
  int mtype = depth == CV_32S || depth == CV_64F ? CV_64F : CV_32F;
  AutoBuffer<double> _mbuf;
  double* mbuf;
  