patch 9.2.0883: scroll: 'smoothscroll' position is lost when using "|"

patch 9.2.0883: scroll: 'smoothscroll' position is lost when using "|"

Problem:  With 'smoothscroll' the scroll position in a long line is lost when
          moving to a column with "|".
Solution: Adjust the skipped columns for the column the cursor ends up in,
          not for column zero.

related: #20885
closes:  #20890

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>