org-goto: Explicitly load org.el and org-refile.el

* lisp/org-goto.el: Require org.el and org-refile.el.

org-goto.el depends on org.el and org-refile.el being loaded, and the
autoloaded org-goto command may be called before org.el and
org-refile.el are loaded (and an org-refile.el load won't be triggered
just by visiting an Org file).

Reported-by: Omar Antolín Camarena <omar@matem.unam.mx>
Ref: https://orgmode.org/list/87h7pil2v5.fsf@matem.unam.mx

lisp/org-goto.el

@@ -22,27 +22,8 @@
 
 ;;; Code:
 
-(require 'org-macs)
-(require 'org-compat)
-
-(declare-function org-at-heading-p "org" (&optional ignored))
-(declare-function org-beginning-of-line "org" (&optional n))
-(declare-function org-defkey "org" (keymap key def))
-(declare-function org-mark-ring-push "org" (&optional pos buffer))
-(declare-function org-overview "org" ())
-(declare-function org-refile-check-position "org" (refile-pointer))
-(declare-function org-refile-get-location "org" (&optional prompt default-buffer new-nodes))
-(declare-function org-show-context "org" (&optional key))
-(declare-function org-show-set-visibility "org" (detail))
-
-(defvar org-complex-heading-regexp)
-(defvar org-startup-align-all-tables)
-(defvar org-startup-folded)
-(defvar org-startup-truncated)
-(defvar org-special-ctrl-a/e)
-(defvar org-refile-target-verify-function)
-(defvar org-refile-use-outline-path)
-(defvar org-refile-targets)
+(require 'org)
+(require 'org-refile)
 
 (defvar org-goto-exit-command nil)
 (defvar org-goto-map nil)