message: cuda_meanStdDev : bug fix
diff: @@ -137,12 +137,11 @@ void cv::cuda::meanStdDev(InputArray _src, OutputArray _dst, Stream& stream)
  if (!deviceSupports(FEATURE_SET_COMPUTE_13))
  CV_Error(cv::Error::StsNotImplemented, "Not sufficient compute capebility");
  - GpuMat src = getInputMat(_src, stream);
  + const GpuMat src = getInputMat(_src, stream);
  CV_Assert( src.type() == CV_8UC1 );
  - _dst.create(1, 2, CV_64FC1);
  - GpuMat dst = _dst.getGpuMat();
  + GpuMat dst = getOutputMat(_dst, 1, 2, CV_64FC1, stream);
  NppiSize sz;
  sz.width = src.cols;
  