[PATCH 1/2] Replace check_mul_overflow_size_t with INT_MULTIPLY_WRAPV

[DJ Delorie]

Adhemerval Zanella <adhemerval.zanella@linaro.org> writes:
>    size_t size;
> -  bool overflow = check_mul_overflow_size_t (element_size, count, &size);
> +  bool overflow = INT_MULTIPLY_WRAPV (element_size, count, &size);

The docs for INT_MULTIPLY_WRAPV says the result type must be signed, but
size_t is NOT signed (throughout).