Wrap waitpid() as a GSource. This is a partial implementation of the "Unix

Wrap waitpid() as a GSource. This is a partial implementation of the "Unix

Sat Feb 14 01:21:34 2004  Matthias Clasen  <maclas@gmx.de>

	* glib/gmain.h:
	* glib/gmain.c (g_child_watch_source_new):
	* glib/gmain.c (g_child_watch_add):
	* glib/gmain.c (g_child_watch_add_full): Wrap waitpid() as a
	GSource. This is a partial implementation of the "Unix signal
	source".  (#50296, Jonathan R. Blandford)

	* configure.in: Add the necessary configury to typedef GPid
	appropriately.

	* tests/Makefile.am:
	* tests/child-test.c: Test child_watch sources.