Fixed case.

stdc.mod/inet_pton.c

@@ -21,7 +21,7 @@ static const char rcsid[] = "$Id: inet_pton.c,v 1.3.18.2 2005/07/28 07:38:07 mar
 #include <sys/cdefs.h>
 //__FBSDID("$FreeBSD: stable/9/sys/libkern/inet_pton.c 213103 2010-09-24 15:01:45Z attilio $");
 
-#include <Ws2tcpip.h>
+#include <ws2tcpip.h>
 
 //#include <sys/param.h>
 //#include <sys/socket.h>