Method pointer

include/sol/reference.hpp:421–426

		}

		const void* pointer(lua_State* L_) const noexcept {
			int si = push(L_);
			const void* vp = lua_topointer(L_, -si);
			lua_pop(L_, si);
			return vp;
		}

		type get_type(lua_State* L_) const noexcept {
			int p = push(L_);