Issue Description:

Using dark axe to break double slab

What happens:

Crash

What you expected to happen:

Break the slabs

Steps to reproduce:

1. Get dark axe
2. Place down double slab
3. Shift-click
   ...

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Affected Versions (Do not use "latest"):

• EnderIO: 1.10.2-3.1.183
• EnderCore: 1.10.2-0.4.1.66-beta
• Minecraft: 1.10.2
• Forge: 12.18.3.2511

Your most recent log file where the issue was present:

https://pastebin.com/Gin3Cb5K