2001-05-30 Gerd Moellmann <gerd@gnu.org>
+ * xfns.c (enum image_value_type): New enumerator
+ IMAGE_STRING_OR_NIL_VALUE.
+ (parse_image_spec): Handle it.
+ (xbm_format, pbm_format): Use it for :foreground and :background.
+ (xbm_load, pbm_load): Check for nil color names.
+
* xterm.c (note_mouse_highlight): If an overlapping overlay
exists, but we find that we highlight the same overlay as before,
don't do the highlighting again.