message: fixed histogram example
diff: @@ -49,10 +49,9 @@ int main(int /* argc */, char * /* argv */[]) {
  /* Increment the bin indices */
  transform<UInt32>(
  - bins, idx, [](auto x) {
  - return x + 1u;
  - },
  - mask
  + bins, idx, mask, [](auto &x) {
  + x += 1u;
  + }
  );
  }
  }
  