[Bug c/64186] Conversion of signed to unsigned of same rank not performed

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64186

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>My interpretation of the C99 conversion rules is that the conversion to 
>unsigned short

You are incorrect, the conversion rules never convert to anything smaller than
int.