fix error for unarmed attacks

game/modules/tome/class/Object.lua

game/modules/tome/class/interface/Combat.lua

game/modules/tome/data/general/grids/basic.lua

game/modules/tome/data/general/grids/forest.lua

game/modules/tome/data/gfx/terrain/grass_dark1.png

game/modules/tome/data/gfx/terrain/pinetree.png

game/modules/tome/data/gfx/terrain/pinetree_dark1.png

game/modules/tome/data/gfx/terrain/tree_dark1.png

game/modules/tome/data/gfx/terrain/tree_yellow.png

game/modules/tome/data/gfx/terrain/tree_yellow_dark1.png

game/modules/tome/data/maps/wilderness/main.lua

game/modules/tome/data/zones/old-forest/grids.lua

game/modules/tome/data/zones/old-forest/npcs.lua

game/modules/tome/data/zones/old-forest/objects.lua

game/modules/tome/data/zones/old-forest/zone.lua

game/modules/tome/data/zones/trollshaws/grids.lua