Issue Description:

Hi, i'm using the new buildcraft alpha buildcraft-7.99.3 mod, and i get a crash on load.
I opened a issue on buildcraft, and found out that BiomesOPlenty is at fault here.

from buildcraft:
'it's a problem with another mod, someone is still returning null instead of an empty itemstack for pickblock'

BuildCraft/BuildCraft#3569

As the buildcraft is still in alpha it works great with my modpack of 72 mods. Hope that BiomesOPlenty will be compatible with buildcraft in the future, because i know it takes a lot of time to code this kind of a great mod.

Steps to reproduce:

1. deleted mod Biomes O' Plenty
2. load Minecraft, everything is fine
3. added mod Biomes O' Plenty
4. Minecraft returns an error while loading the game.

Additional Information:

crash-2017-05-12_11.13.52-client.txt

Affected Versions (Exact numbers, do not use "latest"):

• Biomes O' Plenty: 1.11.2-6.1.0.2213
• Minecraft: 1.11.2
• Forge: 1.11.2-13.20.0.2296

The issue linked above mentions that someone is returning null instead of an empty itemstack for getPickBlock, and that is most certainly not BoP (Feel free to check https://github.com/Glitchfiend/BiomesOPlenty/search?utf8=%E2%9C%93&q=getPickBlock&type= ). Also there's this:

Some other mod is interfering, and I guess BoP just happens to get caught up in it.

Thats yust crazy :) Someone made an evil mod, someone doesnt like BoP. Tnx for your time