Spell: Passwall doesn't need a solid medium to teleport through

[Frumple]

As per title. The description implies that you need a solid medium to travel through for the spell to work. The spell itself works as a simple directed two-space teleport, regardless as to what is -- or isn't, in the case of empty space -- in the way.

Attached is a character with the spell learned and set to hotkey 3, if the behavior is wished to be observed.