Improved error message

ecs-serial/src/ecs-serial.cpp

@@ -94,7 +94,7 @@ namespace ecs::serial {
 				std::cout << '\n';
 				auto func = internal::functions.find(new_id);
 				if (func == internal::functions.end()) {
-					throw std::runtime_error("Unknown id");
+					throw std::runtime_error("No known serializers for component");
 				}
 				Component* component = std::get<2>(func->second)();
 				std::get<1>(func->second)(is, component);