* src/gcompris/Makefile.am: cleanup
	* src/gcompris/gcompris.c: (init_background), (setup_window),
	(gcompris_init): audio cleanup, fixes for win32
	* src/gcompris/properties.c: (gcompris_properties_new),
	(gcompris_properties_save): removed audio out selection
	* src/gcompris/properties.h: removed audio out selection
	* src/gcompris/soundutil.c: (scheduler_bgnd), (thread_play_ogg): fixes for win32