* bus/dispatch.c: lots of fixes

	* dbus/dbus-mainloop.c (_dbus_loop_dispatch): export
	(_dbus_loop_iterate): remove old "quit if no callbacks" code,
	that was crack, broke the test service.

	* dbus/dbus-transport.c (_dbus_transport_open): fix error
	handling to avoid piling up errors if we get a failure on the
	first address.

	* dbus/dbus-internals.c (_dbus_real_assert_not_reached): include
	pid in assertion failures.

	* dbus/dbus-mainloop.c (_dbus_loop_iterate): use static arrays up
	to some fixed size of file descriptor array. Don't return TRUE
	anytime a timeout exists, that led to lots of busy loop silliness
	in the tests.