From 7fb08f691ea45f8e1593497a85478ba52bf95a1e Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Mon, 31 May 1993 19:04:07 +0000
Subject: [PATCH] (calculate_scrolling): Defend against negative baud_rate.

---
 src/scroll.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/scroll.c b/src/scroll.c
index c4882cd091f..3f2724380b3 100644
--- a/src/scroll.c
+++ b/src/scroll.c
@@ -108,6 +108,9 @@ calculate_scrolling (frame, matrix, window_size, lines_below,
      at least 1/4 second.  */
   int extra_cost = baud_rate / (10 * 4 * FRAME_HEIGHT (frame));
 
+  if (baud_rate <= 0)
+    extra_cost = 1;
+
   /* initialize the top left corner of the matrix */
   matrix->writecost = 0;
   matrix->insertcost = INFINITY;