fix(marks): wrong winline info for concealed line with below virt line (#32747)

Problem:  Skipping over a concealed line for which `win_line()`
          _should_ be called because it has `virt_lines_above = false`
          lines associated with it.
Solution: Don't include such a line in `wl_lastlnum` from the line
          above.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/nvim/drawscreen.c b/src/nvim/drawscreen.c
index c17bc2d999..e958610f20 100644
--- a/src/nvim/drawscreen.c
+++ b/src/nvim/drawscreen.c
@@ -2118,13 +2118,13 @@ static void win_update(win_T *wp)
         if (wp == curwin && lnum == curwin->w_cursor.lnum) {
           conceal_cursor_used = conceal_cursor_line(curwin);
         }
-        if (idx > 0) {
-          wp->w_lines[idx - 1].wl_lastlnum = lnum + foldinfo.fi_lines - (foldinfo.fi_lines != 0);
-        }
-        if (lnum == mod_top && lnum < mod_bot) {
-          mod_top += foldinfo.fi_lines ? foldinfo.fi_lines : 1;
-        }
         if (win_get_fill(wp, lnum) == 0) {
+          if (idx > 0) {
+            wp->w_lines[idx - 1].wl_lastlnum = lnum + foldinfo.fi_lines - (foldinfo.fi_lines != 0);
+          }
+          if (lnum == mod_top && lnum < mod_bot) {
+            mod_top += foldinfo.fi_lines ? foldinfo.fi_lines : 1;
+          }
           lnum += foldinfo.fi_lines ? foldinfo.fi_lines : 1;
           spv.spv_capcol_lnum = 0;
           continue;