Fix crash after map change (#593)

Co-authored-by: Michael Wilson <roflmuffin@users.noreply.github.com>

src/core/globals.cpp

@@ -141,7 +141,10 @@ void DetourGameEventManagerInit(IGameEventManager2* pGameEventManager)
 }
 
 int source_hook_pluginid = 0;
-CGlobalVars* getGlobalVars() { return engineServer2->GetServerGlobals(); }
-
+CGlobalVars* getGlobalVars() {
+	INetworkGameServer *server = networkServerService->GetIGameServer();
+	if(!server) return nullptr;
+	return networkServerService->GetIGameServer()->GetGlobals();
+}
 } // namespace globals
 } // namespace counterstrikesharp