h4h5tools

The buffer size for reference numbers was too small; it was 5 byte long.

The file attached to bugzilla #1373 introduces a five-digits-long reference number. Since the buffer is only 5 bytes long, that big reference number corrupted neighbors. After this change, the buffer will be 32 bytes long. This is neither permanent and reliable solution, but this will be ok for at least next few years.