[Ecls-list] bug in ecl_file_position_set

[Brian Spilsbury]

> Good news, there's no heap corruption, I was just being an idiot! I was
> trying to test the force_output patch in isolation, and was running into
> an issue with ffi, which is what my earlier patches were made to fix. My
> mistake on that.

It probably should be finish-output rather than force-output, since
force-output just starts draining the buffer without waiting for it to
finish.
In the current implementation it's probably equivalent, but who knows
about the future? :)

Regards,
Brian.