// return the Lua table at 'idx' as a copied Go slice. If 't' is nil then the slice
// type is []interface{}
func CopyTableToSlice(L *lua.State, t reflect.Type, idx int) interface{} {
if t == nil {
t = reflect.TypeOf(tslice)
}
te := t.Elem()
n := int(L.ObjLen(idx))
slice := reflect.MakeSlice(t, n, n)
for i := 1; i <= n; i++ {
L.RawGeti(idx, i)
val := LuaToGo(L, te, -1)
slice.Index(i - 1).Set(valueOf(val))
L.Pop(1)
}
return slice.Interface()
}