patch 9.0.1019: 'smoothscroll' and virtual text above don't work together

Problem:    'smoothscroll' and virtual text above don't work together.
            (Yee Cheng Chin)
Solution:   Skip virtual text above when w_skipcol is non-zero.
            (closes #11665)
diff --git a/src/charset.c b/src/charset.c
index 7ae15b3..d9609f4 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -1195,7 +1195,7 @@
 
 			cells = text_prop_position(wp, tp, vcol,
 			     (vcol + size) % (wp->w_width - col_off) + col_off,
-						     &n_extra, &p, NULL, NULL);
+					      &n_extra, &p, NULL, NULL, FALSE);
 #ifdef FEAT_LINEBREAK
 			no_sbr = TRUE;  // don't use 'showbreak' now
 #endif