File appender fails if the file has zero bytes

[GoogleCodeExporter]

The "append" function will fail if the file "data.log" is empty (zero bytes
length).
There's a work around by now, just write one single character to it, that's
it. Of course, if you put a line of characters (like a comment) it will
work too.
The pseudo-code to fix this bug is included in the nanofat.cpp, as soon as
I have some spare time I'll fix it.

Original issue reported on code.google.com by strea...@gmail.com on 19 Apr 2009 at 10:41