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/screen.c

diff --git a/src/screen.c b/src/screen.c
index 08e147d..e9bc792 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -2696,7 +2696,8 @@
 #endif
 
     entered = FALSE;
-    --RedrawingDisabled;
+    if (RedrawingDisabled > 0)
+	--RedrawingDisabled;
 
     /*
      * Do not apply autocommands more than 3 times to avoid an endless loop
@@ -4496,7 +4497,7 @@
 	return 0;
     else
 #endif
-	return ((!RedrawingDisabled
+	return ((RedrawingDisabled == 0
 #ifdef FEAT_EVAL
 		    || ignore_redraw_flag_for_testing
 #endif