message: build: fix unused variable warning for vzeroupper guard
diff: @@ -108,7 +108,7 @@ struct VZeroUpperGuard {
  #endif
  inline ~VZeroUpperGuard() { _mm256_zeroupper(); }
  };
  -#define __CV_AVX_GUARD VZeroUpperGuard __vzeroupper_guard;
  +#define __CV_AVX_GUARD VZeroUpperGuard __vzeroupper_guard; (void)__vzeroupper_guard;
  #endif
  #endif // __OPENCV_BUILD
  