inventory slot open?

is there some sort of condition:

"hero inventory slot X" "equal to/not equal to" "empty/not empty" ??

this would be a boolean, right? I'm pretty sure that there should be one, but i don't seem to be able to find it.

thanks,

fr0ggE

Item compare (hero inventory slot X) with (no item)

this lets you see if the slot is empty.