2004-10-09  Jean Brefort  <jean.brefort@normalesup.org>

	* src/graph.c: (gnm_go_data_matrix_eval),
	(gnm_go_data_matrix_finalize), (gnm_go_data_matrix_load_size),
	(cb_assign_matrix_val), (gnm_go_data_matrix_load_values),
	(gnm_go_data_matrix_get_value), (gnm_go_data_matrix_get_str),
	(gnm_go_data_matrix_class_init), (gnm_go_data_matrix_debug_name),
	(gnm_go_data_matrix_init), (gnm_go_data_matrix_new_expr),
	(gnm_go_data_get_dep): New GnmGODataMatrix class.
	* src/graph.h: ditto.
	* src/selection.c: (sv_selection_to_plot): updated to use GnmGODataMatrix
	and related stuff.
	* src/sheet-object.c: (sheet_objects_init): ditto.
	* src/workbook-control-gui.c: (cb_graph_dim_editor_update),
	(wbcg_data_allocator_editor): ditto.