Null pointers not handled

[LordRibblesdale]

Describe the bug In Entity.h "Assign" and "Remove", the code doesn't handle null pointers, in cases of no registers found

Additional context "RegisterFunc assignFunc" is the returned register from a dynamic library. If not found, the pointer is null and, even if checked, the related functions don't exit

        Component *Assign(const std::string &name)
        {
#ifdef _WIN32
            RegisterFunc registerFunc = (RegisterFunc)GetProcAddress(scene->gameModule, ("Register" + name).c_str());
#endif
#ifdef __linux__
            RegisterFunc registerFunc = (RegisterFunc)dlsym(scene->gameModule, ("Register" + name).c_str());
#endif
            if (!registerFunc)
            {
                std::cout << "Failed to get REGISTER(" << name << ") function from Game Module." << std::endl;
            }

            Component *component = (*registerFunc)(*this, scene, scene->initializedComponents, RegisterAction::Assign);

            (*registerFunc)(*this, scene, false, RegisterAction::AddSystem);

            return component;
        }

        void Remove(const std::string &name)
        {
#ifdef _WIN32
            RegisterFunc assignFunc = (RegisterFunc)GetProcAddress(scene->gameModule, ("Register" + name).c_str());
#endif
#ifdef __linux__
            RegisterFunc assignFunc = (RegisterFunc)dlsym(scene->gameModule, ("Register" + name).c_str());
#endif
            if (!assignFunc)
            {
                std::cout << "Failed to get REGISTER(" << name << ") function from Game Module." << std::endl;
            }

            (*assignFunc)(*this, scene, false, RegisterAction::Remove);
        }