Issue Description:

It's possible to put cobble into the facade slot of the painting machine, and then paint it with a facade, giving a block that renders incorrectly

What happens:

What you expected to happen:

I expect it to go into the other slot and paint the conduit facade, not be painted by it

Steps to reproduce:

1. Place cobble and conduit facades into a painting machine, but swap the slots around so that the facade is being painted on to the cobble
2. Place the result in the world

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Affected Versions (Do not use "latest"):

• EnderIO: 1.10.2-3.0.1.145_beta
• EnderCore: 1.10.2-0.4.1.61-beta
• Minecraft: 1.7.10
• Forge: 12.18.3.2185

Your most recent log file where the issue was present:

Not available at time of writing

Facades are no longer valid paint sources (code complete)

Your suggestion to remove the ability to paint cobblestone was moved to the suggestion tracker.