Moved func and arg members from GRealThread to GThread, such that they can

Moved func and arg members from GRealThread to GThread, such that they can

2001-05-08  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* gmain.c, gthread.c, gthread.h: Moved func and arg members from
	GRealThread to GThread, such that they can be accessed by the
	user.

	* gthread.c, gthread.h: Due to popular demand (Tim being the
	populus here ;-) threads now have a 'return value', which is
	returned by g_thread_join and is either the return of the topmost
	thread function or the value given to g_thread_exit.

	* gthreadpool.c, tests/mainloop-test.c, tests/thread-test.c:
	Adapted to the above change.