view: minor changes

src/entt/entity/view.hpp

@@ -425,7 +425,7 @@ private:
  * @tparam Exclude Types of storage used to filter the view.
  */
 template<typename... Get, typename... Exclude>
-class basic_view<get_t<Get...>, exclude_t<Exclude...>, std::enable_if_t<(sizeof...(Get) + sizeof...(Exclude) > 1)>>
+class basic_view<get_t<Get...>, exclude_t<Exclude...>, std::enable_if_t<(sizeof...(Get) != 0u)>>
     : public basic_common_view<std::common_type_t<typename Get::base_type..., typename Exclude::base_type...>, sizeof...(Get), sizeof...(Exclude)> {
     using base_type = basic_common_view<std::common_type_t<typename Get::base_type..., typename Exclude::base_type...>, sizeof...(Get), sizeof...(Exclude)>;