int strncasecmp(const char *_l, const char *_r, size_t n)
{
- const unsigned char *l=_l, *r=_r;
+ const unsigned char *l=(void *)_l, *r=(void *)_r;
if (!n--) return 0;
for (; *l && *r && n && (*l == *r || tolower(*l) == tolower(*r)); l++, r++, n--);
return tolower(*l) - tolower(*r);