Problem: Wrong scrolling in Insert mode with 'smoothscroll' at the
bottom of the window.
Solution: Don't use set_topline() when 'smoothscroll' is set.
fixes: #13612closes: #13613
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
