proxyfuncs.go
func MakeSlice(L *lua.State) int {
	n := L.OptInteger(1, 0)
	s := reflect.MakeSlice(tslice, n, n+1)
	makeValueProxy(L, s, cSliceMeta)
	return 1
}
func MakeSlice(L *lua.State) int {
	n := L.OptInteger(1, 0)
	s := reflect.MakeSlice(tslice, n, n+1)
	makeValueProxy(L, s, cSliceMeta)
	return 1
}
// MakeSlice creates a '[]interface{}' proxy and pushes it on the stack.
//
// Optional argument: size (number)
//
// Returns: proxy ([]interface{})