Fix cursor motion slowdown at the beginning of buffer.

 src/xdisp.c (compute_display_string_pos): Fix logic of caching
 previous display string position.  Initialize cached_prev_pos to -1.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index dd5a1fba871..8aa1237f693 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2011-07-24  Eli Zaretskii  <eliz@gnu.org>
+
+        * xdisp.c (compute_display_string_pos): Fix logic of caching
+        previous display string position.  Initialize cached_prev_pos to
+        -1.  Fixes slow-down at the beginning of a buffer.
+
 2011-07-23  Eli Zaretskii  <eliz@gnu.org>
 
         * xdisp.c (move_it_in_display_line_to): Record the best matching