Avoid errors with recentering in 'skeleton-insert'

* lisp/skeleton.el (skeleton-insert): Don't recenter if we are
running in a buffer other than the one displayed in the selected
window.  (Bug#31950)

lisp/skeleton.el

@@ -268,7 +268,8 @@ available:
 	(or (eolp) (not skeleton-end-newline) (newline-and-indent))
 	(run-hooks 'skeleton-end-hook)
 	(sit-for 0)
-	(or (pos-visible-in-window-p beg)
+	(or (not (eq (window-buffer) (current-buffer)))
+            (pos-visible-in-window-p beg)
 	    (progn
 	      (goto-char beg)
 	      (recenter 0)))