Steam Vent Too Close to Map Edge

[GnosticAres]

I created a new map in build 408 where a steam vent spawned too close to the edge of the map making it completely useless as a generator was not allowed to be built on it.

http://imgur.com/xQDpr73

[AlexxKay]

I also had this happen in 408.

[Pirx Danford]

Oh I was about to post this as a different bug.
In my case the vent is still usable, but so close to the edge that I cant build an enclosing wall... and I like walling in my steam generators :-(

[Tynan]

Bugged: http://ludeon.com/mantis/view.php?id=658