BUG 223 x64 Slab Tool error

[Unatan2]

Just a little bug, not game breaking, but if you select the Slab tool in building menu without any type of slab selected you get this error each time you try to select it:

Windows 7 Home Premium 64-Bit
Alienware R4
Intel® Core™ i7-4820 CPU @ 3.70GHz 3.70GHz
16GB RAM
Graphics:
GeForce GTX 760 (2)

[Stoneheartfan]

I get this error all the time

Also a good few more with slabs, A lot of the time the error’s are my fault cause I’m derpy with them. Weird this wasn’t reported ages ago, It’s been like that for so long

And Alienware Noice