Unused Traversal Types?

[Krazyguy75]

So, I was looking through XComGame, and I noticed that transversal types 12 and 14 were unused. Upon looking through the coding further, I found that XComWorldData listed the two missing traveral types as "eTraversal_Ramp" and "eTraversal_Unreachable".

 

I couldn't find any reference to them being used anywhere, so I was wondering: would it hurt to try and change them to allow new traversal types, such as passing through walls and burrowing?

 

I'm not asking the difficulty of said task, mind you. I'm just wondering if anyone knew if this would break the game.