read_record errors

[akriegl]

I had frequently get_current errors in my log file, although after some failures it succeed to download the current record.
I now found out that the problems seems to be the line
while len(tmp) < record_size and cnt < max_cnt:
in _read_record.
I corrected it to
while len(tmp) <= record_size and cnt < max_cnt:
which resolved the problem.