message: (mozc.el) Fix warnings due to cl library deprecation
  Use cl-lib instead, which does not pollute the Emacs namespace.
diff: (eval-when-compile
  - (require 'cl))
  + (require 'cl-lib))
  @@ -391,7 +391,7 @@ Key code and symbols are renamed so that the helper process understands them."
  (let ((basic-type (event-basic-type event))
  (modifiers (event-modifiers event)))
  ;; Rename special keys to ones the helper process understands.
  - (let ((key (case basic-type
  + (let ((key (cl-case basic-type
  (?\b 'backspace)
  (?\s 'space)
  (?\d 'backspace)
  @@ -823,7 +823,7 @@ Non-nil SEPARATOR is inserted between each segment."
  (mapconcat
  (lambda (segment)
  (apply #'propertize (mozc-protobuf-get segment 'value)
  - (case (mozc-protobuf-get segment 'annotation)
  + (cl-case (mozc-protobuf-get segment 'annotation)
  (highlight
  '(face mozc-preedit-selected-face))
  (t
  @@ -1254,7 +1254,7 @@ The function returns non-nil on success, and nil on failure."
  ;; work as expected if the point is off the screen.
  (vertical-motion -1)
  (scroll-up 1))
  - (incf scrolled-lines))
  + (cl-incf scrolled-lines))
  (let ((content (car contents)))
  (let ((left-text (car content))
  (right-text (cadr content))
  @@ -1640,7 +1640,7 @@ version -- should be version string"
  "Invalidate variable `mozc-helper-process' if PROC is not running normally.
  Current implementation throws MESSAGE away."
  (when (eq proc mozc-helper-process)
  - (case (process-status proc)
  + (cl-case (process-status proc)
  (run) ; Do nothing.
  (t ; Invalidate mozc-helper-process.
  (setq mozc-helper-process nil)))))
  