From: Richard M. Stallman <rms@gnu.org>
Date: Mon, 23 Dec 2002 18:04:45 +0000 (+0000)
Subject: (window_scroll_pixel_based): Fix check for reaching BEGV.
X-Git-Tag: ttn-vms-21-2-B4~11925
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=07ce8b53eae95f8bc5ca40e99cf781966e9a71aa;p=emacs.git

(window_scroll_pixel_based): Fix check for reaching BEGV.
Don't try to make last line fully visible if it is past end of window.
---

diff --git a/src/window.c b/src/window.c
index fb81e45cbc4..3f115260adf 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4149,12 +4149,13 @@ window_scroll_pixel_based (window, n, whole, noerror)
 
   /* End if we end up at ZV or BEGV.  */
   if ((n > 0 && IT_CHARPOS (it) == ZV)
-      || (n < 0 && IT_CHARPOS (it) == CHARPOS (start)))
+      || (n < 0 && IT_CHARPOS (it) == BEGV))
     {
       if (IT_CHARPOS (it) == ZV)
 	{
-	  if (it.current_y + it.max_ascent + it.max_descent
-	      > it.last_visible_y)
+	  if (it.current_y < it.last_visible_y
+	      && (it.current_y + it.max_ascent + it.max_descent
+		  >= it.last_visible_y))
 	    {
 	      /* The last line was only partially visible, make it fully
 		 visible.  */