simon-svn: puzzles: simon

[Commits to Tartarus CVS repository.]

SVN root:       svn://svn.tartarus.org/sgt
Changes by:     simon
Revision:       9400
Date:           2012-02-02 07:18:14 +0000 (Thu, 02 Feb 2012)

Log message (6 lines):
David Nickerson reports that it's possible to lay a line over a 'no
line here' cross mark by dragging, and furthermore, that doing so puts
that grid edge into a stuck state that no UI action short of undo can
get it back out of. Fix drags to stop at crosses, and fix execute_move
to fault any move string that nonetheless somehow managed to try to
set a line over a cross without explicitly tagging it 'R'.

Modified files:
U   puzzles/pearl.c

Links:
http://svn.tartarus.org/sgt/?rev=9400&view=rev
http://svn.tartarus.org/sgt/puzzles/pearl.c?rev=9400&r1=9399&r2=9400