From 88a4da97478ec6b4b2f361315a5a183333d0aa3f Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicm@openbsd.org>
Date: Wed, 15 May 2013 15:39:51 +0000
Subject: [PATCH] Don't let cursor position overflow when reflowing, from
 Christopher Collins.

---
 screen.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/screen.c b/screen.c
index 754effc2..76aa91c6 100644
--- a/screen.c
+++ b/screen.c
@@ -365,7 +365,13 @@ void
 screen_reflow(struct screen *s, u_int new_x)
 {
 	struct grid	*old = s->grid;
+	u_int		 change;
 
 	s->grid = grid_create(old->sx, old->sy, old->hlimit);
-	s->cy -= grid_reflow(s->grid, old, new_x);
+
+	change = grid_reflow(s->grid, old, new_x);
+	if (change < s->cy)
+		s->cy -= change;
+	else
+		s->cy = 0;
 }