libvpx: Pull from upstream

source/libvpx/args.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 
 #include <stdlib.h>
 #include <string.h>
 #include <limits.h>
 #include "args.h"
 
-#ifdef _MSC_VER
-#define snprintf _snprintf
-#endif
+#include "vpx_ports/msvc.h"
 
 #if defined(__GNUC__) && __GNUC__
 extern void die(const char *fmt, ...) __attribute__((noreturn));
 #else
 extern void die(const char *fmt, ...);
 #endif
 
 
 struct arg arg_init(char **argv) {
   struct arg a;
@@ skipping 199 matching lines @@
   die("Option %s: Invalid value '%s'\n", arg->name, arg->val);
   return 0;
 }
 
 
 int arg_parse_enum_or_int(const struct arg *arg) {
   if (arg->def->enums)
     return arg_parse_enum(arg);
   return arg_parse_int(arg);
 }