BUG: One-click cyst chaining ('Cystem' from b251) places cysts on otherwise unbuildable geometry.

bp2008

In other words, the automatic cyst placement is ignoring flags on geometry like CommanderNoBuild and CommanderInvisible.

This is breaking some of my maps where there is a room aliens are not supposed to be able to cyst into.

DC_Darkling

its worse if the cyct sinks through the floor and doesnt work.