2011-01-08  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* src/item-edit.c (item_edit_draw): add NULL argument to call of
	  gnumeric_background_set
	* src/item-grid.c (item_grid_draw_merged_range): add theme argument
	  to pass to gnumeric_background_set
	(item_grid_draw_background): ditto
	(item_grid_draw_region): pass theme to item_grid_draw_merged_range and
	  item_grid_draw_background
	* src/pattern.h (gnumeric_background_set): add theme argument
	* src/pattern.c (gnumeric_background_set): add and use theme argument
	(gnm_get_light): new
	* src/preview-grid.c (preview_grid_draw_background): add NULL argument
	  to call of gnumeric_background_set