[fix] windows wrong call

lib/index.js

@@ -9,8 +9,8 @@ module.exports = {
     newFileInstance: (filePath, sigStock) => {
         const instance = Object.create(UnsafeWoTB)
         if (process.platform == 'win32') {
-        let bufferedPath = new Buffer(filePath,'ascii');
-            instance.init(binding.new_unsafe_file_instance(bufferedPath, bufferedPath.length, sigStock))
+            //let bufferedPath = new Buffer(filePath,'ascii');
+            instance.init(binding.new_unsafe_file_instance(filePath, sigStock))
         } else {
             instance.init(binding.new_unsafe_file_instance(filePath, sigStock));
         }