2011-05-17 Ivan Maidanski <ivmai@mail.ru>

2011-05-17  Ivan Maidanski  <ivmai@mail.ru>

	* pthread_support.c (pthread_join): Add assertion (check thread is
	finished).
	* pthread_support.c (GC_register_my_thread): Don't detach the
	thread if invoked from the thread destructor.
	* win32_threads.c (GC_register_my_thread): Ditto.
	* win32_threads.c (GC_unregister_my_thread): Don't delete the
	thread (just set FINISHED) if the thread is not detached (only if
	GC_PTHREADS); add assertion (check the thread is not finished).
	* tests/threadkey_test.c (main): Join some created threads.