Patch: Export unicode typo

Attached patch fixes what looks like a typo in the reading of previous
unicode settings when exporting files from the query editor.

Also, I sent a rather large patch yesterday, that has yet to show up on
the list. I assume there is a size limit, which puts it on hold? Please
let it through :P

I'll send a couple of patches now, but send them as separate mails just
in case ;-)

//Magnus