message: LOG2 for _MSC_VER hack
diff: @@ -56,12 +56,7 @@ void wrap(const size_t N, DBODY &&d_body, HBODY &&h_body)
  // *****************************************************************************
  #ifdef _MSC_VER
  -#include <intrin.h>
  -unsigned int LOG2(unsigned int X){
  - unsigned long n;
  - _BitScanReverse(&n, X|1);
  - return n;
  -}
  +#define LOG2(X) (1)
  #else
  #define LOG2(X) ((unsigned) (8*sizeof(unsigned long long)-__builtin_clzll((X))))
  #endif
  