bug#3494: Review line-move-visual patch

[Chong Yidong]

Hi Stefan,

I just checked in a patch into the trunk, which makes line-move-visual
play properly with truncated lines (Bugs 3494 and 3805).  I think it
should go to the branch as well.  Could you review it?

2009-07-11  Chong Yidong  <cyd@stupidchicken.com>

        * simple.el (temporary-goal-column): Change the value for
        line-move-visual to a cons cell.
        (line-move-visual): Record or set the window hscroll, if
        necessary (Bug#3494).
        (line-move-1): Handle cons value of temporary-goal-column.