Fix a typo in inet_ntop.c (#151)

inet_ntop.c

@@ -54,7 +54,7 @@ static const char *inet_ntop6(const unsigned char *src, char *dst, size_t size);
  *     On Windows we store the error in the thread errno, not
  *     in the winsock error code. This is to avoid loosing the
  *     actual last winsock error. So use macro ERRNO to fetch the
- *     errno this funtion sets when returning NULL, not SOCKERRNO.
+ *     errno this function sets when returning NULL, not SOCKERRNO.
  * author:
  *     Paul Vixie, 1996.
  */