Trying to call undefined slime-update-system-indentation

slime.el tries to do:

      (if (boundp 'common-lisp-system-indentation)
          ;; A table provided by slime-cl-indent.el.
          (slime-update-system-indentation symbol indent packages)

But this fails because `common-lisp-system-indentation' is defined in `slime-cl-indent.el' whereas `slime-update-system-indentation' is defined in `slime-indentation.el'

It would be safer to change that way:

--- a/slime.el
+++ b/slime.el
@@ -7046,7 +7046,7 @@ is setup, unless the user already set one explicitly."
     (let ((symbol (intern (car info)))
           (indent (slime-intern-indentation-spec (second info)))
           (packages (third info)))
- (if (boundp 'common-lisp-system-indentation)
+ (if (fboundp 'slime-update-system-indentation)
           ;; A table provided by slime-cl-indent.el.
           (slime-update-system-indentation symbol indent packages)
         ;; Does the symbol have an indentation value that we set?