Fix error output in vehicle voxel rule
Fix error output in vehicle voxel rule

FranciscoDA/OpenApoc,Istrebitel/OpenApoc,FranciscoDA/OpenApoc,ShadowDancer/OpenApoc,FranciscoDA/OpenApoc,pmprog/OpenApoc,steveschnepp/OpenApoc,ShadowDancer/OpenApoc,steveschnepp/OpenApoc,pmprog/OpenApoc,Istrebitel/OpenApoc