Delay running the type creation event until after initialisation.

Doing this during the ctor can run into circumstances where the
vtable has not been fully initialised and the call gets routed to
the pure virtual implementation causing a crash.

src/modulemanager.cpp

@@ -222,6 +222,7 @@ ModuleReturn ModuleManager::LoadModule(const Anope::string &modname, User *u)
 	for (auto &mods : EventHandlers)
 		mods.push_back(m);
 
+	Serialize::CreateTypes();
 	m->Prioritize();
 
 	FOREACH_MOD(OnModuleLoad, (u, m));