rem: unsigned int i; unsigned char const *s1 = (unsigned char const *) vs1; unsigned char const *s2 = (unsigned char const *) vs2;
add: size_t i; char const *s1 = vs1; char const *s2 = vs2;
context: memcasecmp (const void *vs1, const void *vs2, size_t n){  unsigned int i;  unsigned char const *s1 = (unsigned char const *) vs1;  unsigned char const *s2 = (unsigned char const *) vs2;  for (i = 0; i < n; i++)    {      unsigned char u1 = *s1++;      unsigned char u2 = *s2++;      if (TOUPPER (u1) != TOUPPER (u2))        return TOUPPER (u1) - TOUPPER (u2);    }  return 0;}