From: Scott Corley <scott@scorley.com>
Date: Sun, 7 Oct 2018 07:10:29 +0000 (-0700)
Subject: Fix overflow lockup with frames > 255 lines
X-Git-Tag: emacs-27.0.90~4332
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=ee3f4698704c26c503064e15ad7a75b7d693b1e4;p=emacs.git

Fix overflow lockup with frames > 255 lines

* src/scroll.c (struct matrix_elt): Change unsigned char fields to
int to handle frames with more than 255 lines (Bug#32951).
Copyright-paperwork-exempt: yes
---

diff --git a/src/scroll.c b/src/scroll.c
index a29f2d37f54..240005b4e32 100644
--- a/src/scroll.c
+++ b/src/scroll.c
@@ -41,13 +41,13 @@ struct matrix_elt
     int deletecost;
     /* Number of inserts so far in this run of inserts,
        for the cost in insertcost.  */
-    unsigned char insertcount;
+    int insertcount;
     /* Number of deletes so far in this run of deletes,
        for the cost in deletecost.  */
-    unsigned char deletecount;
+    int deletecount;
     /* Number of writes so far since the last insert
        or delete for the cost in writecost. */
-    unsigned char writecount;
+    int writecount;
   };
 
 static void do_direct_scrolling (struct frame *,