Gold/money cost for attacks isn't checked

[ohrrpgce-bugbot]

[bz#982]

You can use an attack/cast a spell even if you don't have enough gold (in which case you end up with zero). Further the full amount is displayed as being deducted.

The same technically applies to HP too, though that is probably intentional (though it could be useful to have a required HP cost...)

Related to Bug bz⁠#981

From: @rversteegen
Reported version: Nightly WIP (Callipygous)

[rversteegen]

Duplicate of #1077 .