Failures log pass=0 and pass = 1 and they do not log the message

[Ara Pulido]

Binary package hint: python-ldtp

Please describe the problem:
Using ldtprunner

When trying to log a failure a have in my code:

logFailures ("Files differ.", True, "fail")

And in the log this is what I get:

<test>
[...]
<pass>0</pass>
<screenshot>screenshots/screenshot-03-04-2009-12-32-1236166332.png</screenshot>
<pass>1</pass>
</test>

The message with "Files differ" does not get logged and there are two entries
for the <pass> tag, one with 0 and the other with 1.