src: fix use of uv_cwd, len includes the NULL byte

src/node.cc

@@ -1598,16 +1598,10 @@ static void Cwd(const FunctionCallbackInfo<Value>& args) {
     return env->ThrowUVException(err, "uv_cwd");
   }
 
-#ifdef _WIN32
-  // TODO(tjfontaine) in the future libuv will report the size include the null
-  // for now only windows does, remove conditionals after libuv upgrade
-  cwd_len -= 1;
-#endif
-
   Local<String> cwd = String::NewFromUtf8(env->isolate(),
                                           buf,
                                           String::kNormalString,
-                                          cwd_len);
+                                          cwd_len - 1);
   args.GetReturnValue().Set(cwd);
 }