Minecraft version: 1.12.2
Wizardry version: 4.1.2
Environment: Singleplayer/Server

Issue details: Holding Wand with no spells and pressing b or n and logging out then trying to relogging back in

Link to crash report: https://gist.github.com/AzureZhen/ab4192ac81d2bb3758aae29b9d30f517

Didn't even notice that this is a duplicate of #90. Although this issue was first, since all the discussion is there now I'll close this one.

Ok, I can see what's going on there, I just need an extra safety check. Thanks for reporting.