Fix cursor motion in bidi-reordered continued lines.

 xdisp.c (try_cursor_movement): Backup to non-continuation line
 only after finding point's row.  Fix the logic.  Rewrite the loop
 over continuation lines in bidi-reordered buffers.  Return
 CURSOR_MOVEMENT_MUST_SCROLL upon failure to find a suitable row,
 rather than CURSOR_MOVEMENT_CANNOT_BE_USED.

diff --cc src/ChangeLog
index 18e0aab2a6dea1255aa2c3772a93a08f7a81ae20,814b30bbdad25974d2b640531b405060092941f9..718f2b385d87220ca6e6b5901842f857c0e0619e
--- 1/src/ChangeLog
--- 2/src/ChangeLog
+++ b/src/ChangeLog
@@@ -1,6 -1,14 +1,15 @@@
 -      * xdisp.c (try_cursor_movement): Fix the logic.  Rewrite the loop
+ 2010-05-29  Eli Zaretskii  <eliz@gnu.org>
+ 
 -2010-05-28  Eli Zaretskii  <eliz@gnu.org>
++      Fix cursor motion in bidi-reordered continued lines.
++      * xdisp.c (try_cursor_movement): Backup to non-continuation line
++      only after finding point's row.  Fix the logic.  Rewrite the loop
+       over continuation lines in bidi-reordered buffers.  Return
+       CURSOR_MOVEMENT_MUST_SCROLL upon failure to find a suitable row,
+       rather than CURSOR_MOVEMENT_CANNOT_BE_USED.
+ 
 +2010-05-28  Michael Albinus  <michael.albinus@gmx.de>
  
 -      * xdisp.c (try_cursor_movement): Backup to non-continuation line
 -      only after finding point's row.
 +      * fileio.c (Fdelete_file): Pass TRASH arg to handler call.
  
  2010-05-28  Kenichi Handa  <handa@m17n.org>