996f822930
Some systems don't define a SIZE_MAX (older versions of HP-UX with aCC). The logic was already in place to account for this condition but SIZEOF_SIZE_T was not getting cmoputed at configure time to allow it to function. This computes sizeof(size_t) at configure time to allow the appropriate logic to work. It also changes SIZEOF_SIZE_T to SIZE_OF_SIZE_T for consistency.