Revert "Revert "newer standards prefer nullptr over NULL - this is most of them but there are others too""

This reverts commit 8e2160f33e.

external/3rd/library/soePlatform/CTServiceGameAPI/TestClient/Main.cpp

@@ -10,7 +10,7 @@
 using namespace CTService;
 
 unsigned						openRequests = 0;
-CTServiceAPI					*waitclient = NULL;
+CTServiceAPI					*waitclient = nullptr;
 std::map<unsigned, unsigned>	m_tests;
 std::string						game_code;