message: cmake: emit error if CUDA is enabled without opencv_contrib
diff: @@ -35,6 +35,9 @@ if(DEFINED WINRT AND NOT DEFINED ENABLE_WINRT_MODE_NATIVE)
  endif()
  if(HAVE_CUDA)
  + if(NOT TARGET opencv_cudev)
  + message(FATAL_ERROR "CUDA: OpenCV requires enabled 'cudev' module from 'opencv_contrib' repository: https://github.com/opencv/opencv_contrib")
  + endif()
  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef -Wenum-compare -Wunused-function -Wshadow)
  endif()
  