2006-10-28  Jonathan Matthew  <jonathan@kaolin.wh9.net>

	* shell/rb-shell-player.c: (rb_shell_player_class_init),
	(rb_shell_player_sync_with_source),
	(rb_shell_player_get_playing_time_string), (rb_shell_player_seek),
	(tick_cb):
	* widgets/rb-header.c: (rb_header_sync_time),
	(rb_header_elapsed_changed_cb):
	Treat elapsed time as signed, since rb_player_get_time returns a
	signed value.  When actually using the value, mostly treat negative
	values as 0.  Fixes #365908.