Original error without the fix:

opencv/modules/objdetect/src/cascadedetect.cpp: In member function 'bool cv::CascadeClassifierImpl::ocl_detectSingleScale(const cv::_InputArray&, cv::Size, int, double, cv::Size)':
/opencv/modules/objdetect/src/cascadedetect.cpp:1215:
error: no matching function for call to 'cv::ocl::Kernel::args(cv::ocl::KernelArg, cv::ocl::KernelArg, cv::ocl::KernelArg, int, cv::ocl::KernelArg, cv::ocl::KernelArg, cv::ocl::KernelArg, cv::Size&, int&, float, cv::Rect&, cv::Size&, cv::CascadeClassifierImpl::<anonymous enum>)'

bug in example

Conflicts:
	modules/cuda/test/test_objdetect.cpp
	modules/gpu/perf/perf_core.cpp
	modules/gpu/perf/perf_video.cpp
	modules/gpu/test/test_core.cpp

This is not meaningful when compiling to javascript, and causes warning
at linking stage.

Conflicts:
	modules/core/src/system.cpp