Small speedbar-related clean-up

* lisp/dframe.el (x-sensitive-text-pointer-shape, x-pointer-shape):
Remove unnecessary declarations.
(dframe-message): Doc fix.

* lisp/info.el (dframe-select-attached-frame, dframe-current-frame):
Declare.

* lisp/speedbar.el (speedbar-message): Make it an obsolete alias.
Update all callers.
(speedbar-with-attached-buffer)
(speedbar-maybee-jump-to-attached-frame): Make these aliases obsolete.
(speedbar-with-writable): Use backquote.

* lisp/emacs-lisp/eieio-opt.el (eieio-describe-class-sb):

* lisp/emacs-lisp/eieio-speedbar.el (eieio-speedbar-handle-click):
Use dframe-with-attached-buffer, dframe-maybee-jump-to-attached-frame
rather than speedbar- aliases.

* lisp/mail/rmail.el: Load dframe rather than speedbar when compiling.
(speedbar-make-specialized-keymap, speedbar-insert-button)
(dframe-select-attached-frame, dframe-maybee-jump-to-attached-frame)
(speedbar-do-function-pointer): Declare.
(rmail-speedbar-button, rmail-speedbar-find-file)
(rmail-speedbar-move-message):
Use dframe-with-attached-buffer rather than speedbar- alias.

* lisp/progmodes/gud.el: Load dframe rather than speedbar when compiling.
(dframe-message, speedbar-make-specialized-keymap)
(speedbar-add-expansion-list, speedbar-mode-functions-list)
(speedbar-make-tag-line, speedbar-remove-localized-speedbar-support)
(speedbar-insert-button, dframe-select-attached-frame)
(dframe-maybee-jump-to-attached-frame)
(speedbar-change-initial-expansion-list)
(speedbar-previously-used-expansion-list-name): Declare.
(gud-speedbar-item-info, gud-gdb-goto-stackframe):
Use dframe-message, dframe-with-attached-buffer rather than
speedbar- aliases.
(gud-sentinel): Silence compiler.

* lisp/progmodes/vhdl-mode.el (speedbar-refresh)
(speedbar-do-function-pointer, speedbar-add-supported-extension)
(speedbar-add-mode-functions-list, speedbar-make-specialized-keymap)
(speedbar-change-initial-expansion-list, speedbar-add-expansion-list)
(speedbar-extension-list-to-regex, speedbar-directory-buttons)
(speedbar-file-lists, speedbar-make-tag-line)
(speedbar-line-directory, speedbar-goto-this-file)
(speedbar-center-buffer-smartly, speedbar-change-expand-button-char)
(speedbar-delete-subblock, speedbar-position-cursor-on-line)
(speedbar-make-button, speedbar-reset-scanners)
(speedbar-files-item-info, speedbar-line-text)
(speedbar-find-file-in-frame, speedbar-set-timer)
(dframe-maybee-jump-to-attached-frame, speedbar-line-file): Declare.
(speedbar-with-writable): Do not (re)define it.
(vhdl-speedbar-find-file): Use dframe-maybee-jump-to-attached-frame
rather than speedbar- alias.

* lisp/cedet/ede/speedbar.el (ede-file-find, ede-tag-find):
* lisp/cedet/semantic/sb.el (semantic-sb-token-jump):
Use dframe-maybee-jump-to-attached-frame rather than speedbar- alias.

* lisp/mh-e/mh-speed.el (mh-speed-view):
Use dframe-with-attached-buffer rather than speedbar- alias.

lisp/dframe.el

@@ -243,9 +243,6 @@ Local to those buffers, as a function called that created it.")
   "Return non-nil if FRAME is currently available."
   (and frame (frame-live-p frame) (frame-visible-p frame)))
 
-(defvar x-sensitive-text-pointer-shape)
-(defvar x-pointer-shape)
-
 (defun dframe-frame-mode (arg frame-var cache-var buffer-var frame-name
 			      local-mode-fn
 			      &optional
@@ -681,7 +678,7 @@ Optionally select that frame if necessary."
   "Non-nil means that `dframe-message' should just return a string.")
 
 (defun dframe-message (fmt &rest args)
-  "Like message, but for use in a dedicated frame.
+  "Like `message', but for use in a dedicated frame.
 Argument FMT is the format string, and ARGS are the arguments for message."
   (save-selected-window
     (if dframe-suppress-message-flag