Fix scrolling with partial lines

* src/xdisp.c (partial_line_height): New function.
(try_scrolling):
* src/window.c (window_scroll_pixel_based): Use it for calculating the
pixel scroll margin correctly in a window with partial lines.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/window.c b/src/window.c
index ba03780f3df..95690443f8e 100644
--- a/src/window.c
+++ b/src/window.c
@@ -5147,7 +5147,7 @@ window_scroll_pixel_based (Lisp_Object window, int n, bool whole, bool noerror)
          in the scroll margin at the bottom.  */
       move_it_to (&it, PT, -1,
                   (it.last_visible_y - WINDOW_HEADER_LINE_HEIGHT (w)
-                   - this_scroll_margin - 1),
+                   - partial_line_height (&it) - this_scroll_margin - 1),
                   -1,
                   MOVE_TO_POS | MOVE_TO_Y);