patch 9.1.1427: rendering artifacts with the tabpanel

Problem:  rendering artifacts with the tabpanel
          (char101)
Solution: prevent double redraw, use Columns instead of frame width
          (Hirohito Higashi)

fixes: #17429
closes: #17435

Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/term.c b/src/term.c
index bf56361..b7a82da 100644
--- a/src/term.c
+++ b/src/term.c
@@ -4478,7 +4478,7 @@
 {
     OUT_STR(tgoto((char *)T_CS, (int)Rows - 1, 0));
     if (*T_CSV != NUL)
-	OUT_STR(tgoto((char *)T_CSV, topframe->fr_width - 1, 0));
+	OUT_STR(tgoto((char *)T_CSV, Columns - 1, 0));
     screen_start();		    // don't know where cursor is now
 }