Fix the new code on MacOS (and probably Linux)
Fix the new code on MacOS (and probably Linux)

It was missing a closing ). :-/

Also correctly handle the case where we don't need to multiply (offset = 0);
we'd otherwise do a shift by 64, which is a no-op on some platforms.

ulfjack/ryu,ulfjack/ryu,ulfjack/ryu,ulfjack/ryu