[PATCH] vect: Only scale vec_offset once [PR123767].

[Robin Dapp]

> Just to confirm this patch fixes the original SEGFAULT that caused the PR and 
> FWIW LGTM given my fairly basic understanding of whats going on.

Thanks, that's reassuring to hear because I just noticed some minutes ago that
I actually tested an older version of the patch so the "bootstrapped and 
regtested on aarch64" part is not yet true :)

-- 
Regards
 Robin