functions that create special X-Objects. e.g. special-window:none,
special-pixmap:copy-from-parent.
- added a discloser for windows (makes debugging easier).
- fixed bugs in gcontext-font, get-window-attributes and text-width
- added enumerated types for colormap-alloc in create-colormap and grab-mode
and points to pairs (x . y). Added some auxiliary functions for that.
+ text: made the format arguments optional, and default to '1-byte.
+ added comments.