Re-Fix DebugEvaluateWithoutStack test on Windows

test/cctest/test-debug.cc

 // Copyright 2007-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2184 matching lines @@
 }
 
 
 // We match parts of the message to get evaluate result int value.
 bool GetEvaluateStringResult(char *message, char* buffer, int buffer_size) {
   const char* value = "\"value\":";
   char* pos = strstr(message, value);
   if (pos == NULL) {
     return false;
   }
-  Vector<char> buf(buffer, buffer_size - 1);
-  OS::StrNCpy(buf, pos, buffer_size);
+  Vector<char> buf(buffer, buffer_size);
+  OS::StrNCpy(buf, pos, buffer_size - 1);
+  buffer[buffer_size - 1] = '\0';
   return true;
 }
 
 
 struct EvaluateResult {
   static const int kBufferSize = 20;
   char buffer[kBufferSize];
 };
 
 struct DebugProcessDebugMessagesData {
@@ skipping 3733 matching lines @@
 
   break_point_hit_count = 0;
   foo->Call(env->Global(), 0, NULL);
   CHECK_EQ(1, break_point_hit_count);
 
   v8::Debug::SetDebugEventListener(NULL);
   debugee_context = v8::Handle<v8::Context>();
   debugger_context = v8::Handle<v8::Context>();
   CheckDebuggerUnloaded();
 }