lisp/org-agenda.el: Prevent wrong scrolling

* lisp/org-agenda.el (org-agenda-later): Prevent window from
scrolling to the point when `scroll-conservatively' is > 101.

Reported-by: Gustavo Barros <gusbrs.2016@gmail.com>
Link: https://orgmode.org/list/87lfh2hk4k.fsf@gmail.com/

lisp/org-agenda.el

@@ -8344,7 +8344,8 @@ With prefix ARG, go forward that many times the current span."
 	  (org-agenda-overriding-arguments
 	   (list (car args) sd span)))
       (org-agenda-redo)
-      (org-agenda-find-same-or-today-or-agenda cnt))))
+      (org-agenda-find-same-or-today-or-agenda cnt))
+    (set-window-start nil 1)))
 
 (defun org-agenda-earlier (arg)
   "Go backward in time by the current span.