fix: windows fopen mode should end with \x00

Author: Young-Flash

fs_sync/fs_sync_native.mbt

@@ -59,7 +59,7 @@ fn get_error_message() -> String {
 
 ///|
 fn read_file_to_bytes_internal(path : String) -> Bytes! {
-  let file = fopen_ffi(mbt_string_to_utf8_bytes(path, true), b"rb")
+  let file = fopen_ffi(mbt_string_to_utf8_bytes(path, true), b"rb\x00")
   guard is_null(file) == 0 else { raise IOError(get_error_message()) }
   guard fseek_ffi(file, 0, 2) == 0 else { raise IOError(get_error_message()) }
   let size = ftell_ffi(file)
@@ -87,7 +87,7 @@ fn read_file_to_string_internal(
 
 ///|
 fn write_bytes_to_file_internal(path : String, content : Bytes) -> Unit! {
-  let file = fopen_ffi(mbt_string_to_utf8_bytes(path, true), b"wb")
+  let file = fopen_ffi(mbt_string_to_utf8_bytes(path, true), b"wb\x00")
   guard is_null(file) == 0 else { raise IOError(get_error_message()) }
   let bytes_written = fwrite_ffi(content, 1, content.length(), file)
   guard bytes_written == content.length() else {