thread initialization

[z pekar gmail com]

I have following thread initialization routine:

	if (!g_thread_supported()) {
		g_thread_init(NULL);
		gdk_threads_init(); // Called to initialize internal mutex
"gdk_threads_mutex".
	} else {
		g_print("Error: g_thread not supported.\n");
		gtk_main_quit ();
	}

on the first call of the function that has that code everything works
ok, but on the second call - it enters the else statment and says
Error: g_thread not supported.
what is wrong?