Quickfort Magma Forges/Smelter/etc invalid placement

Using Quickfort #build for Magma Forges/Smelters/etc are only valid on invalid tiles

Example:

Digging the channels for magma access:

`
#dig
,h,,,h,,,h,,,h,,,h
`

The Smelters

`
#build
,el,,,el,,,el,,,el,,,el
`

If used in order, the Smelters cannot be placed. You can however place the blueprint on invalid tiles but they won't function nor can you dig under them.


