Issue Description:

Game crash when elevator contains "elevator controller block"

What happens:

when you make an elevator containing a "elevator controller block" the game crashes

What you expected to happen:

i expected the elevator to form and the game to not crash, maby that the controller would even work

Steps to reproduce:

1. build an structure with the controller block in it
2. make an elevator
3. crash

Log file

crash-2020-02-16_23.15.57-server.txt

Affected Versions 1.15.2-8.0.2:

• Thutcore: 1.15.2-7.0.1
• Minecraft: 1.15.2
• Forge: 1.15.2-31.1.0

It seems some of the 1.14.4/1.15.2 re-write changes broke the controllers on the elevators, I will try to get this fixed, in the mean time, don't put controllers on the elevators.

fixed: https://www.curseforge.com/minecraft/mc-mods/thutcore/files/2883915

woah that was a fast fix, going to test it tomorrow