* libnautilus-extensions/nautilus-directory.c:
(construct_alternate_metafile_uri):
* libnautilus-extensions/nautilus-file-utilities.c:
(nautilus_make_path), (nautilus_get_user_directory),
(nautilus_get_desktop_directory),
(nautilus_get_user_main_directory),
(nautilus_get_pixmap_directory):
* libnautilus-extensions/nautilus-file-utilities.h:
* libnautilus-extensions/nautilus-global-preferences.c:
(global_preferences_register_for_ui):
* libnautilus-extensions/nautilus-icon-factory.c:
(get_themed_icon_file_path):
* libnautilus-extensions/nautilus-preferences-item.c:
(add_icon_themes):
* src/file-manager/fm-properties-window.c: (get_property_names):
* src/nautilus-application.c:
(nautilus_application_check_user_directories):
* src/nautilus-bookmark-list.c:
(nautilus_bookmark_list_get_file_path):
* src/nautilus-desktop-window.c: (nautilus_desktop_window_new):
* src/nautilus-first-time-druid.c: (druid_finished):
* src/nautilus-property-browser.c:
(nautilus_property_browser_drag_data_get), (make_drag_image),
(remove_color), (remove_background), (remove_emblem),
(get_xml_path), (add_background_to_browser), (add_color_to_file),
(emblem_dialog_clicked), (make_properties_from_directory):
Change file utilities special directory access functions to always
return allocated strings.  Change all callers to match the new
functions and free the results.

Also change the file utilities functions to always create the
special directories if needed.