option.c: use rb_w32_inet_ntop

* ext/socket/option.c (inet_ntop): use rb_w32_inet_ntop, instead of
  inet_ntop directly, which is unavailable on older version Windows.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36567 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,4 +1,7 @@
-Sun Jul 29 23:56:49 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Sun Jul 29 23:57:27 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/socket/option.c (inet_ntop): use rb_w32_inet_ntop, instead of
+	  inet_ntop directly, which is unavailable on older version Windows.
 
 	* win32/win32.c (rb_w32_inet_ntop): type should be const.
 

ext/socket/option.c

@@ -452,8 +452,8 @@ inet_ntop(int af, const void *addr, char *numaddr, size_t numaddr_len)
 #endif
     return numaddr;
 }
-#elif !defined HAVE_ARPA_INET_H
-extern char *inet_ntop(int af, const void *addr, char *numaddr, size_t numaddr_len);
+#elif defined _WIN32
+# define inet_ntop(f,a,n,l)      rb_w32_inet_ntop(f,a,n,l)
 #endif
 
 /* Although the buffer size needed depends on the prefixes, "%u" may generate "4294967295".  */