Issue description:

Can not access the fields of an Itemstack in oc.

What happens:

After retrieving the items of the system you are unable to access any information of them because everything returns null.

What you expected to happen:

Steps to reproduce:

1. Make an opencomputers setup
2. Get the items of the refined storage system
3. Try to access the fields of an itemstack (name, label, etc)

Version (make sure you are on the latest version before reporting):

• Minecraft: 1.12
• Forge:
• Refined Storage: latest

Does this issue occur on a server? [yes/no]

yes

Fixed in ac1a8d4