Making turrets work on a lower material block

[Rinart73]

Avorion: 0.22 - 0.23.3, but I believe this is an old bug.

 

Example:

[*]Get a xanion turret

[*]Place a xanion block

[*]Place turret on that block

[*]Replace the block with a lower material block

[*]Turret still here and it works just fine

 

So one of 2 things needs to happen in this case:

• Disallow replacing blocks with a lower material if they have a turret
  
• Remove a turret from block