Fix a few clang warnings (which -Werror treats as errors)

test/cctest/test-compiler.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
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 //
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 #include <stdlib.h>
-#include <wchar.h>  // wint_t
+#include <wchar.h>
 
 #include "v8.h"
 
 #include "compiler.h"
 #include "disasm.h"
 #include "disassembler.h"
 #include "execution.h"
 #include "factory.h"
 #include "platform.h"
 #include "cctest.h"
@@ skipping 28 matching lines @@
   for (int i = 0; i < args.Length(); i++) {
     if (i != 0) printf(" ");
     v8::HandleScope scope;
     v8::Handle<v8::Value> arg = args[i];
     v8::Handle<v8::String> string_obj = arg->ToString();
     if (string_obj.IsEmpty()) return string_obj;
     int length = string_obj->Length();
     uint16_t* string = NewArray<uint16_t>(length + 1);
     string_obj->Write(string);
     for (int j = 0; j < length; j++)
-      printf("%lc", static_cast<wint_t>(string[j]));
+      printf("%lc", static_cast<wchar_t>(string[j]));
     DeleteArray(string);
   }
   printf("\n");
   return v8::Undefined();
 }
 
 
 static PrintExtension kPrintExtension;
 v8::DeclareExtension kPrintExtensionDeclaration(&kPrintExtension);
 
@@ skipping 307 matching lines @@
   CompileRun("function f() { a = 12345678 }; f();");
   CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));
   CompileRun("function f(x) { a = 12345678 + x}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x += 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x = 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));
 }
 #endif