- split P_SetupLevel so that the main part of it can be made part of the MapLoader class.

- allocate BlockNodes from the same memory arena as SecNodes.

src/win32/i_main.cpp

@@ -1343,7 +1343,7 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE nothing, LPSTR cmdline, int n
 	_CrtSetDbgFlag (_CrtSetDbgFlag(0) | _CRTDBG_LEAK_CHECK_DF);
 
 	// Use this to break at a specific allocation number.
-	//_crtBreakAlloc = 177312;
+	_crtBreakAlloc = 227524;
 #endif
 
 	DoMain (hInstance);