2002-01-04  Jody Goldberg <jody@gnome.org>

	* dialog-graph-guru.c (vector_state_fill) : more protection for
	  missing series.

	* ms-chart.c (excel_chart_series_write_xml) : more protection for
	  missing series.

	* src/gnumeric-graph.c (gnm_graph_series_get_dimension) : more
	  protection for missing series.
	(gnm_graph_series_add_dimension) : ditto.