wallhack: fix vector functions returning objects of wrong schema

augment/modules/wh.lua

@@ -20,11 +20,11 @@ return function()
     end
 
     local function vec3Scale(k, v)
-        return {k * v.x, k * v.y, k * v.z}
+        return {x = k * v.x, y = k * v.y, z = k * v.z}
     end
 
     local function vec3Add(u, v)
-        return {u.x + v.x, u.y + v.y, u.z + v.z}
+        return {x = u.x + v.x, y = u.y + v.y, z = u.z + v.z}
     end
 
     local function toFrontCoords(entity)