(window_scroll_pixel_based): Don't correct preserve_y

for CURRENT_HEADER_LINE_HEIGHT when moving backwards.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/window.c b/src/window.c
index d42ff11d7dd..735bd99fd55 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4688,7 +4688,8 @@ window_scroll_pixel_based (window, n, whole, noerror)
         ;
       else if (preserve_y >= 0)
         {
-          /* If we have a header line, take account of it.  */
+          /* If we have a header line, take account of it.
+             This is necessary because we set it.current_y to 0, above.  */
           if (WINDOW_WANTS_HEADER_LINE_P (w))
             preserve_y -= CURRENT_HEADER_LINE_HEIGHT (w);
 
@@ -4728,9 +4729,14 @@ window_scroll_pixel_based (window, n, whole, noerror)
         {
           SET_TEXT_POS_FROM_MARKER (start, w->start);
           start_display (&it, w, start);
+#if 0  /* It's wrong to subtract this here
+          because we called start_display again
+          and did not alter it.current_y this time.  */
+
           /* If we have a header line, take account of it.  */
           if (WINDOW_WANTS_HEADER_LINE_P (w))
             preserve_y -= CURRENT_HEADER_LINE_HEIGHT (w);
+#endif
 
           move_it_to (&it, -1, -1, preserve_y, -1, MOVE_TO_Y);
           SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it));