message: check correct flag
diff: #include <cstring>
  #include <cassert>
  -#define USE_SSE2 (cv::checkHardwareSupport(CV_CPU_SSE))
  +#define USE_SSE2 (cv::checkHardwareSupport(CV_CPU_SSE2))
  #define USE_SSE4_2 (cv::checkHardwareSupport(CV_CPU_SSE4_2))
  #define USE_AVX (cv::checkHardwareSupport(CV_CPU_AVX))
  #define USE_AVX2 (cv::checkHardwareSupport(CV_CPU_AVX2))
  