Do not allow the cursor to go to a separator row. Fixes #441219, modified

Do not allow the cursor to go to a separator row. Fixes #441219, modified

2007-08-22  Kristian Rietveld  <kris@imendio.com>

	Do not allow the cursor to go to a separator row.  Fixes #441219,
	modified patch by Carlos Garnacho.

	* gtk/gtktreeview.c (row_is_separator): new inline function
	for calling the row-separator-func, made all of gtktreeview.c use
	this function instead of calling the func themselves,
	(gtk_tree_view_button_press): treat a click on a separator like
	a click on empty space,
	(gtk_tree_view_update_rubber_band_selection_rage): skip
	non-selectable rows,
	(search_first_focusable_path),
	(gtk_tree_view_focus_to_cursor),
	(gtk_tree_view_move_cursor_up_down),
	(gtk_tree_view_move_cursor_page_up_down),
	(gtk_tree_view_move_cursor_start_end): skip separators,
	(gtk_tree_view_real_set_cursor): do not allow setting the cursor
	on a separator.

svn path=/trunk/; revision=18672