commit 79cdf026f1b8a16298ee73be497c4bd5f3458cde
author Bram Moolenaar <Bram@vim.org> Sat May 20 14:07:00 2023 +0100
committer Bram Moolenaar <Bram@vim.org> Sat May 20 14:07:00 2023 +0100
tree 2f2381a497126df7030b96450b1b1bfd4257c487
parent bf63011a52a3cc32609ae5945665875062a5ae50

patch 9.0.1571: RedrawingDisabled not used consistently

Problem:    RedrawingDisabled not used consistently.
Solution:   Avoid RedrawingDisabled going negative.  Set RedrawingDisabled in
            win_split_ins(). (closes #11961)

src/edit.c

diff --git a/src/edit.c b/src/edit.c
index 64edddc..a882d67 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -3613,7 +3613,8 @@
     temp = curwin->w_cursor.col;
     if (disabled_redraw)
     {
-	--RedrawingDisabled;
+	if (RedrawingDisabled > 0)
+	    --RedrawingDisabled;
 	disabled_redraw = FALSE;
     }
     if (!arrow_used)