Fix a typo that caused crashes in redisplay.

 src/xdisp.c (compute_stop_pos_backwards): Fix a typo that caused crashes while
 scrolling through multibyte text.

2 files changed, 3 insertions, 1 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 39bdd191188..6b5b6e1455d 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -5,6 +5,8 @@
         that fails, clear the desired glyph matrix before returning a
         failure indication to the caller.  Fixes leaving garbled display
         when fast scrolling with a down-key.  (Bug#12403)
+        (compute_stop_pos_backwards): Fix a typo that caused crashes while
+        scrolling through multibyte text.
 
 2012-09-12  Jan Djärv  <jan.h.d@swipnet.se>
 
diff --git a/src/xdisp.c b/src/xdisp.c
index 3fab4b54cf0..c5962541cb6 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -7669,7 +7669,7 @@ compute_stop_pos_backwards (struct it *it)
     {
       it->end_charpos = min (charpos + 1, ZV);
       charpos = max (charpos - SCAN_BACK_LIMIT, BEGV);
-      SET_TEXT_POS (pos, charpos, BYTE_TO_CHAR (charpos));
+      SET_TEXT_POS (pos, charpos, CHAR_TO_BYTE (charpos));
       reseat_1 (it, pos, 0);
       compute_stop_pos (it);
       /* We must advance forward, right?  */