(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.

1 files changed, 4 insertions, 3 deletions

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.  */