[NaCl SDK] nacl_io: Fix bug in getaddrinfo() where service is "0"

native_client_sdk/src/libraries/nacl_io/host_resolver.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifndef __STDC_LIMIT_MACROS
+#define __STDC_LIMIT_MACROS
+#endif
+
 #include "nacl_io/host_resolver.h"
 
 #include <assert.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "nacl_io/kernel_proxy.h"
 #include "nacl_io/ossocket.h"
 #include "nacl_io/pepper_interface.h"
 
 #ifdef PROVIDES_SOCKET_API
 
 namespace {
@@ skipping 206 matching lines @@
 
   if (node == NULL && service == NULL)
     return EAI_NONAME;
 
   // Check the service name (port).  Currently we only handle numeric
   // services.
   long port = 0;
   if (service != NULL) {
     char* cp;
     port = strtol(service, &cp, 10);
-    if (port > 0 && port <= 65535 && *cp == '\0') {
+    if (port >= 0 && port <= UINT16_MAX && *cp == '\0') {
       port = htons(port);
     } else {
       return EAI_SERVICE;
     }
   }
 
   struct addrinfo default_hints;
   memset(&default_hints, 0, sizeof(default_hints));
   const struct addrinfo* hints = hints_in ? hints_in : &default_hints;
 
@@ skipping 179 matching lines @@
   hostent_.h_addr_list = NULL;
 #if !defined(h_addr)
   // Initialize h_addr separately in the case where it is not a macro.
   hostent_.h_addr = NULL;
 #endif
 }
 
 }  // namespace nacl_io
 
 #endif  // PROVIDES_SOCKET_API