Standardizing wchar->char in main().

src/xenia/base/main_win.cc

@@ -13,6 +13,8 @@
 #include <gflags/gflags.h>
 #include <io.h>
 
+#include <cstdlib>
+
 // Autogenerated by `xb premake`.
 #include "build/version.h"
 
@@ -72,7 +74,7 @@ int Main() {
   for (int n = 0; n < argca; n++) {
     size_t len = wcslen(argv[n]);
     argva[n] = reinterpret_cast<char*>(alloca(len + 1));
-    wcstombs_s(nullptr, argva[n], len + 1, argv[n], _TRUNCATE);
+    std::wcstombs(argva[n], argv[n], len + 1);
   }
 
   // Parse flags; this may delete some of them.